List Of Curtas List Of CurtasHow old is your Curta relative to the others on the list? Do you have a serial number incrementally next to someone else on the list? Is your Curta the oldest known of either a Type I or a Type II? Is your Curta the newest known of either Type? Is your Curta's serial number a prime number? Is it one of a twin prime (the next prime number differs by only 2 counts)? Is the next one on the list the twin prime to yours? See http://www.utm.edu/research/primes/lists/small/
Below is an ordered listing of Curtas and their owners. The Curtas are listed in ascending numerical order using their serial numbers as the index.
You can add your name and your Curta's serial number to the list by clicking here --> [1] <-- or click the "Edit Text" link at the bottom of this page. You'll have to locate the position within the text where you want to place your entry, so just scroll down as needed in the editing window. Place your cursor after the name of the owner for the Curta that precedes your serial number, type a carriage return, insert a single blank space as a first character of the new line (immediately before your Curta's serial number), and finally type your Curta's serial number, your name, and where you live (if you wish). Insert dashes and spaces as in the other listings. Important...You must insert a single blank space as the first character of the new line. This puts your entry on a new line in the updated Curta list page, and aligns your information properly with that above and below. Also, if you normally use upper case letters somewhere in the middle of your name, please add a space before the "mid-word" upper case letters. Doing so will prevent a new Wiki page from automatically being formed. (See AddingNewPages for details.)
Due to improper use of this page for private purposes, you are now required to register with Curta.org if you wish to add your name and machine serial number to the owner's list. When you select the "Edit Text" link, you'll be asked to login or register. Follow the directions given to you and you'll be allowed to modify this and other Curta.org pages.
Or, if you prefer not to register, you can send your name, location, and the serial number of your Curta to mailto:curta.info@gmail.com using a subject something like "Add my name". The administrators of the Curta.org site will then update this list with your information.
All Type I's are listed first, as their serial numbers started at 1 (assumed, but not confirmed) and continued up to approximately 80500. Type II serial numbers started at 500001 (also assumed and very likely the case, as serial number 500025 is in someone's possession) and continued up to approximately 570000.
Factory documentation indicates that the last Type I produced by Contina was serial number 79524. Contina documentation also states that the last Type II produced was serial number 561660. When the factory doors closed, some workers were given enough parts to build complete machines. These Type I and Type II Curtas were assigned serial numbers higher than the highest factory documented units. These machines are true Curtas in every sense...they simply were built outside the factory facilities by the same people who assembled them within the factory.
To discover whether your Curta's serial number happens to be a prime number, go to: http://www.utm.edu/research/primes/lists/small/ or http://www.prime-numbers.org/
By the way, if you have a Curta Type I with serial number 8128, you may have the only Curta manufactured with a "perfect number" as its serial number. (This assumes that Type I's with serial numbers 6, 28, and 496 (the only perfect numbers less than 8128) were never made. The next perfect number greater than 8128 is 33550336, and no Curta was made with such a high serial number.) For information on Perfect Numbers go to: http://primes.utm.edu/glossary/page.php?sort=PerfectNumber
TYPE I
970 -- Johannes Schranz 978 -- Burkhard Pock (Austria) 2044 -- Donald Rosen (USA) 2049 -- Donald Rosen (USA) 2096 -- Paul Fiel 2185 -- RickFurr (USA) 2880 -- Donald Rosen (USA) 3047 -- JackChristensen (USA) 3065 -- Geoffrey Cross 3067 -- Claude Van Houtte 3103 -- Des Harrison (New Zealand ex SA) 3234 -- Daniel Lewin 3275 -- Donald Rosen (USA) 3404 -- Hermann Hierhager (Germany) 3488 -- Peter Geldof 3605 -- Steve Saslow (USA) 3681 -- Pepper S. Younts (USA) 3748 -- Robert Rosenwald 3823 -- David Richardson (USA) -- TwinPrimeCurta; the higher of its twin prime 3821 3919 -- Santiago de Churruca Egoscozabal -- TwinPrimeCurta; the higher of its twin prime 3917 3928 -- Rosa Schlaepfer Pereira 4379 -- Frans Goedhart (fransamsterdam the netherlands) 4414 -- John Race 4421 -- JackChristensen (USA) 4474 -- John Bell 4529 -- Erez Kaplan 4703 -- James Black -- PrimeNumberCurta 4730 -- Mitch Wofchuck 4744 -- Donald Rosen (USA) 4811 -- Donald Rosen (USA) 4937 -- JackChristensen (USA) 4965 -- JackChristensen (USA) 5098 -- Ignacio Barbosa Moreira 5099 -- Peter Bird -- TwinPrimeCurta; the lower of its twin prime 5101 5187 -- Mike Griessel 5227 -- Lita Hayes -- PrimeNumberCurta 5856 -- Alastair Redpath-Stevens 6083 -- Israel da Silva (Brazil) 6656 -- R. N. Labas (Chile) 6735 -- Jim Walpole (UK) 6845 -- Dr David Key 7057 -- Daniel Lewin -- PrimeNumberCurta 7087 -- Joel Texier 7269 -- Ian Battey 7450 -- Waldbauer Helmut 7633 -- E. Sprague (USA) 7624 -- Donald Rosen (USA) 7729 -- DOouglas Mahone (USA) 7753 -- Hermann Hierhager (Germany) -- PrimeNumberCurta 7854 -- David Southall 7903 -- Bernard Cadier 8245 -- H.J.MEAD 8248 -- Maurice Robinson 8321-- Nicholas Cassin 8354 -- John Birch 8399 -- John Bentley 8428 -- David Owensby 8651 -- ???? -- In Demonstration Kit unit sold on eBay in January 2003 8726 -- Dr. Srinivas K. Reddy 8883 -- Ralph Hesson 9068 -- Nita de Glanville 9092 -- Glen Davidge 9242 -- Martin Wood 9296 -- James Black 9570 -- Erik Novikoff 9724 -- Peter Hobbs (UK) 9916 -- Mark G. Leonard 10133 -- Mario Nagano -- PrimeNumberCurta 10148 -- Paulo Boselli 10212 -- Donald Rosen (USA) 10265 -- Frank De Witt 10289 -- Clifford A Johnson (USA) PrimeNumberCurta 10300 -- David Bannister 10370 -- David Richardson (USA) 10414 -- Fernando Aveledo (Venezuela) 10577 -- Prof. Karl Kleine 10582 -- George O'Farrell 10643 -- Donald Rosen (USA) 10759 -- Colin Labouchere 11039 -- Gernot Hilger (Bonn, Deutschland) (S/N=7x19x83) 11155 -- Robert Adam 11220 -- Lars Lund-Hansen 11259 -- John Wells (South Africa) 11348 -- Eddie Letzer 11536 -- Marc Hoffeld 12023 -- Francisco A. Amaral 12203 -- Pepper S. Younts (USA) -- PrimeNumberCurta 12270 -- Juan Luis Munoz de Laborde 12365 -- Robert Shaffer 12793 -- Laurence Bixby 12841 -- John Lafler -- PrimeNumberCurta 12873 -- David Lukasik 12936 -- Charles Brown 12969 -- Dr Patrick Covernton 13017 -- Rob Lewis 13056 -- Adam 13136 -- Birthe Dissing 13316 -- Leo F Braun 13426 -- Dan Kennison 13545 -- Matthias M Weber 14392 -- Brian Lewis 14568 -- Habib Karacan 14611 -- Ed Zinszer 14902 -- James Black 14949 -- Dan Hamilton 14961 -- Denise Banks 15045 -- Rick Furr (USA) 15053 -- Paul Ricci -- PrimeNumberCurta 15529 -- Pepper S. Younts (USA) 15881 -- Rich Beck -- PrimeNumberCurta 15941 -- David Harper (USA) 16812 -- Richard Rafter 16829 -- Dave Slater -- PrimeNumberCurta 16855 -- Jeff Wilson 16956 -- Dr. Stan Fry, Jr. 16985 -- David Owensby 17075 -- JackChristensen (USA) 17626 -- Stanley Siege 17881 -- Daniel Davis (USA) -- PrimeNumberCurta 17903 -- Jim Bridges -- PrimeNumberCurta 17942 -- Peter Schneider (USA) 18027 -- Bob Grow 18204 -- Robert Delgado (USA) 18754 -- Gerry Kennedy (UK) 18832 -- Linda Blythe 18866 -- James Black 18944 -- Lars Lund-Hansen 19038 -- Orthopedic Surgeon 19049 -- Dov Gadot 19327 -- Craig Reynolds 19500 -- Norm Guttormson 19716 -- Peter Misic 19739 -- Peter Hobbs (UK) 19834 -- Joel O'Rourke 19847 -- Ian Gent 19881 -- Daniel V Klein 20021 -- Darrel R. Dilley -- TwinPrimeCurta; the lower of its twin prime 20023 20022 -- Bobby L. Jones 20071 -- Bill Taylor A.S.C. -- PrimeNumberCurta 20089 -- Gary Marsden -- PrimeNumberCurta 20175 -- Vincent Merlen (Canada) 20247 -- Jay Holovacs 20255 -- Takashi Tanemura (Japan) 20350 -- Valery Tsimmerman, P.E. 20526 -- Harold Mernick 20759 -- Kurt Rochlitz -- PrimeNumberCurta 21302 -- Don Spann (USA) 21319 -- Jim May -- PrimeNumberCurta 21352 -- Dean P Mc Cullough 21452 -- Craig Hammes 21994 -- Mike Williams 22102 -- Luc Degols 22908 -- Herb Gold 23575 -- Mark Westaway 24019 -- Carlos L. Gaston -- PrimeNumberCurta 24149 -- Peter W. Allen 24218 -- Don Hediger 24838 -- Andres Romero Ortiz 24855 -- Martin Feichtinger 25356 -- Bruno Perrone Delgado (Ecuador) 25668 -- Edmundo Duran 25801 -- Donald Rosen (USA) "Twin Prime Curta"; the higher of its twin prime 25799 25832 -- Otto Frex Mayer 25915 -- Art Rosen 25945 -- Donald Rosen (USA) Cut Model 26449 -- Gilles Bajolet -- PrimeNumberCurta 27545 -- Dave Aitchison (Australia) 27970 -- Sandra Ausher 28037 -- Whisperine 28269 -- John Bellefleur (Canada) 28290 -- Dave Estall 28332 -- Gus Teljer 28382 -- Caesar Guevara 28732 -- Richard Williams 29063 -- Paul Powell -- PrimeNumberCurta 29093 -- Patrick Finnigan 29274 -- John Steigerwald 29505 -- Rob Waight 29636 -- Michael C. Gibbons 29749 -- Peter Hobbs (UK) 29759 -- Martin Sidley -- PrimeNumberCurta 29799 -- Corey R. Vest 29810 -- Waldbauer Helmut 30422 -- Louis Skelton, Curator 30903 -- Gerry Hughes 31110 -- John Targell 31486 -- Juerg Dedual 31649 -- Peter Hobbs (UK) -- PrimeNumberCurta 31654 -- Klara Reisch 31797 -- Mery Christophe 32597 -- Bill Taylor A.S.C. 32882 -- William R. Clements 32937 -- Denis Miller (Australia) 33138 -- John Bellefleur (Canada) 33140 -- John Bellefleur (Canada) 33142 -- Alex (Sandy) Mackay 33199 -- Thomas Mc Namara (USA) -- PrimeNumberCurta 33212 -- Nicholas Bodley 33940 -- Marcelo Amarante 34097 -- Stefan Nordqvist 34224 -- Ben Edgington 34387 -- Hans-Joachim Hoeft 34400 -- Sandy Houck 34712 -- Bill Bowers 34726 -- Cleo E. Mc Call 34811 -- Steve A 34969 -- Darrin B (USA) 35058 -- Phil Symons 35243 -- David Senkfor(USA) 35276 -- John De Koning 35410 -- Fredrik Breivald 35923 -- Olle Nilsson -- PrimeNumberCurta 35969 -- Peter Hobbs (UK) -- PrimeNumberCurta 36252 -- Frank G. Soler 36440 -- Erwin Tomash 36642 -- Hans-Joachim Hoeft 37262 -- Christian Miller (Austria) -- Demo Curta in green presentation box 37279 -- Harold Meltzer 37583 -- John Bellefleur (Canada) 37683 -- Pierre Zimmerman 37947 -- Ulrich Clormann 38203 -- Harold Meltzer 38230 -- Mohammed Zahir .M. Chawdhry 38282 -- Roger R. Hineman 38335 -- Simon Cassford 38368 -- Erez Kaplan 38599 -- Mark Butterworth 38603 -- John S. James -- PrimeNumberCurta 38766 -- Martin Feichtinger 39133 -- Thomas Mc Namara (USA) -- PrimeNumberCurta 39172 -- Skip Downey (USA) 39353 -- Chris Warman (USA) 39643 -- Craig Seeley 39824 -- Peter Hobbs (UK) 40030 -- Michael Meissner (Germany) 40198 -- Jan Brown 40437 -- Ray Feldman 40557 -- Ray Woods 40674 -- Bruno Wroblewski 41115 -- Miki Mihajlovic 41784 -- Bruce C. Boatwright (Madison, SD) 41837 -- Peter Hobbs (UK) 41989 -- Dr. Srinivas K. Reddy 42177 -- Paul Van Hoof 42769 -- Heidi Abrams 42770 -- Arthur S. Graham (USA) 42999 -- Dana G. Tremblay 43080 -- Steve White 43241 -- Gary Steinbaugh 43298 -- Ann R. Craven 43323 -- Larry D. Allgood 43437 -- Donald A. Sharp 43547 -- Lavillat Christian 44150 -- Rick Stanard 44193 -- David Bonnes 44233 -- Christoffer Holmberg 44385 -- Don Murtagh 44423 -- Max Matthews 44605 -- Thomas Shaffer 44642 -- George Bingley 45160 -- R. N. Labas - (Chile) 45167 -- Richard Weixler 45632 -- Neil Bartlett 45740 -- Pepper S. Younts 46011 -- Peter Hobbs (UK) 46560 -- Kleber Loureiro (Brazil) 48243 -- John J Pisarcik 48663 -- Brian Randell (UK) 48680 -- Pablo Flores Maini 48722 -- Waldbauer Helmut 48723 -- Fredrick Karubian 48762 -- Waldbauer Helmut 48808 -- Artur Kultys (Poland) 48838 -- Mal Thurman 48842 -- Don Townsend 49400 -- Tunny Pattison 49414 -- Dale Boyd 49444 -- Brian Lewis 49465 -- Larry Mc Elhiney 49603 -- Darin May -- PrimeNumberCurta 50248 -- Oktay Haracci 50383 -- Mark W. Rodgers -- PrimeNumberCurta 50448 -- Harold Goldberg 50492 -- Mario Garza 50515 -- William Wasmer 50571 -- Doug Glover 51196 -- Bengt-Eric Grandin 51266 -- Ken Sanford (USA) 51295 -- Frank Gagliano 51832 -- Peter Hobbs (UK) 51842 -- David Andersen 51909 -- Douglas A. Cawley 52043 -- Jim Bianchi 52116 -- Charles Jensen 52313 -- Peter Schneider (USA) 52458 -- Lawrence Keeney 52546 -- Elizabeth Greenberg 53124 -- Klaus Hanfler 53177 -- Waldbauer Helmut 53256 -- The Boyds 53267 -- Jamie Cox -- TwinPrimeCurta; the lower of its twin prime 53323 -- Richard Weixler -- PrimeNumberCurta 53429 -- Ulrich Clormann 53611 -- Donald Rosen (USA) -- TwinPrimeCurta; the higher of its twin prime 53609 54647 -- Doug Woods -- PrimeNumberCurta 55358 -- Peter Hobbs (UK) 55500 -- Pepper S. Younts (USA) 55628 -- Jim Spofford - http://www.jimspofford.com 55800 -- Marcel van der Sluis 55845 -- Glenn Bell 55875 -- Fung Mun Tong Louis (Hong Kong) 55937 -- Donald Rosen (USA) -- Demonstrator 56190 -- MD Meason 56245 -- Joseph J Hansen 56250 -- RT Young 56295 -- Michele Sandra Murphy 56434 -- Matz Cohen 56691 -- Nathan Zeldes 56711 -- Donald Rosen (USA) -- TwinPrimeCurta; the lower of its twin prime 56713 57202 -- JackChristensen (USA) 57376 -- Waldbauer Helmut 57555 -- Steve Saslow (USA) 57592 -- Peter Hobbs (UK) 57607 -- Brian Cohen 57897 -- Andy McNish? (Canada) 58134 -- Ken Seydel 58294 -- Grant Youngman 58298 -- John Bellefleur (Canada) 58562 -- Rick Furr (USA) 58582 -- David Richardson (USA) 59073 -- Giovanni Breda 59112 -- Udo Stichling 59132 -- Aimeric 59349 -- Glenn Jolliffe 60003 -- Mark Warren 60052 -- Wim Schouten 60413 -- Pepper S. Younts (USA) -- PrimeNumberCurta 60510 -- Walter J. Gray 60609 -- David Senkfor (USA) 60674 -- Roger D. Brown 60870 -- Mark Handler 61438 -- Graham D Harris 61990 -- Giovanni Breda 62076 -- R. Bruce Gezon 62305 -- Donald Rosen (USA) 62569 -- Bob Mason 62675 -- Gray Poole 63252 -- Fred Jacobs 63341 -- Peter Hobbs (UK) 63708 -- Julian Burke 64065 -- K. J. Curtis 64112 -- Chris Woodward 64224 -- Lindley and Charlotte Mixon 64360 -- Charles Smith 64448 -- Tony Bennett (UK) 64555 -- E. H. Rettig 64779 -- Werner Schaefer 65250 -- Stephen Rowe 65448 -- Gerwin R. Bertelmann 65929 -- Thomas Mc Namara (USA) -- TwinPrimeCurta; the higher of its twin prime 65927 65963 -- Michael Jason Edwards -- PrimeNumberCurta 66132 -- Bill Leonard 66666 -- Michael Barger 66683 -- Laszlo Boydan 66831 -- Thom Boughton 66870 -- Dave Bunsey, Sr. 67290 -- Richie Tomasich 67399 -- George E. Heath -- PrimeNumberCurta 67406 -- JackChristensen (USA) 67544 -- Jim Carlson 67557 -- Alex Friedman 67619 -- Rich Scholl -- PrimeNumberCurta 67741 -- Mark Jason Dominus -- PrimeNumberCurta 67995 -- Dib Karam Junior 67997 -- Ludgerus Friedhoff 68696 -- Javier Susaeta-Erburu 68909 -- David Weil -- PrimeNumberCurta 69125 -- David Bannister 69601 -- Eric Furman 69639 -- Ben Hogue 69979 -- Larry Vanice 70071 -- Douglas Brown 70224 -- Peter Guerrini 70393 -- Donald Rosen (USA) 70511 -- James Godwin 70669 -- Bill Leonard 70883 -- Andrew Davie 71070 -- Rupert Quayle 71125 -- David Kristopeit 71132 -- Donald Rosen (USA) 71198 -- Hap Murphy 71239 -- JackChristensen (USA) 71275 -- William Mc Bride 71424 -- Bill Stanard 71335 -- Stephen M. Evans 71739 -- Tom Callan 71766 -- Vincent Merlen (Canada) 72353 -- Chris Andreae -- PrimeNumberCurta 72367 -- JackChristensen (USA) 72412 -- Darrell Haulsee 72523 -- Robert Irwin 72538 -- Nigel Thompson 72857 -- Clay Castleberry 73060 -- Bill Thacker 73064 -- Ian Drown 73410 -- Andrew Forsberg 73545 -- Allan Simon 73591 -- Herb Gold 73736 -- Rick Miskell 73961 -- Scott Soper -- PrimeNumberCurta 74021 -- Walt Kammer (USA) -- PrimeNumberCurta 74116 -- Jim Hawkins 74678 -- Mark Reinhardt 75083 -- Gerhard Wenzel -- PrimeNumberCurta 75262 -- Dave Daley 75395 -- Adams Douglas 75422 -- Peter Hobbs (UK) 75460 -- Donald Rosen (USA) 75549 -- Tom Poole 75586 -- Arden Howell IV 75789 -- Diane 75896 -- Roland Soucie 75931 -- Richard L. De Saussure, III -- PrimeNumberCurta 76153 -- Michel Poirier-Defoy 76258 -- Vaclav Michal Stepanek 76640 -- Gary D. Snyder 76695 -- James Bradshaw (UK) 76994 -- Gary Fleischer 77052 -- Harold Mernick 77061 -- COL Jim Van Dam (Ret) 77142 -- Skip Godfrey (USA) 77514 -- Joel O'Rourke 77619 -- MSG Larry Turley 77621 -- David Senkfor (USA) -- PrimeNumberCurta 77648 -- David Rackowitz 77678 -- Terry Petty 77735 -- Christopher Paraskevas 77798 -- Burt Newmark 77823 -- Graham Hill 77908 -- Bill Potvin 77937 -- Donald Rosen (USA) 78057 -- John Favill 78096 -- Tommy Estridge 78642 -- Dianne Wood 78845 -- J. Dekker 79020 -- John Marvin 79123 -- Bernhard Adams 79130 -- JackChristensen (USA) 79256 -- Mac Thompson 79294 -- Pepper S. Younts (USA) 79572 -- Martin Feichtinger 79721 -- Peter Hobbs (UK) 79813 -- Hoch Florian -- PrimeNumberCurta 79933 -- Donald Rosen (USA) 80288 -- Thomas Stocker 80332 -- Hermann Hierhager (Germany)
TYPE II
500025 -- Jim Walpole (UK) 500067 -- Brian J. Kemp 500084 -- Fred Sweeting 500088 -- HansRudolfRoshard (Switzerland) 500125 -- Hermann Hierhager (Germany) 500159 -- Ian Mcintyre (New Zealand) 500204 -- Donald Rosen (USA) 500315 -- Steve Saslow (USA) 500415 -- JackChristensen (USA) 500485 -- Tony Offerman 500494 -- JackChristensen (USA) 500639 -- Paul Smith 500671 -- David Richardson (USA) 500747 -- Manuel Dierbach (Germany) 500845 -- Martin Feichtinger 500963 -- Donald Rosen (USA) 501065 -- Donald Rosen (USA) 501067 -- Steven Swift (USA) 501072 -- Donald Rosen (USA) 501203 -- Donald Rosen (USA) 501324 -- Bernard Stedman 501325 -- Damon O'Donoghue 501374 -- JackChristensen (USA) 501449 -- DennyHardy (Europe) 501523 -- Roger Kirkham 501656 -- Dwayne Newton 501787 -- Victor Kuhl 501905 -- Mike Williams 502072 -- Donald Rosen (USA) 502211 -- Peter Hobbs (UK) 502620 -- Richard Freedland 502693 -- Harold Mernick 502809 -- David Nessl 503322 -- Waldbauer Helmut 503359 -- Glen Davidge -- PrimeNumberCurta 503486 -- John Rix 503491 -- Pepper S. Younts (USA) 503867 -- Alan Hoare 504220 -- Hans-Joachim Hoeft 504538 -- Donald Rosen (USA) 504708 -- David Richardson (USA) 504889 -- Donald Rosen (USA) 504988 -- John Favill 505168 -- John W. Stanley 505245 -- R. N. Labas - (Chile) 505288 -- Felix Franco 505299 -- Peter Hobbs (UK) 505454 -- Claudio Ballard 505608 -- Prof. Karl Kleine 505917 -- R. N. Labas - (Chile) 506051 -- Peter Hobbs (UK) 506367 -- Stephen Brenner 506419 -- Chris Gillings 506524 -- Pablo Andres Pichardo 506551 -- Michael Meissner (Germany) -- PrimeNumberCurta 506602 -- German Castro (France) 506711 -- David Spandl 506738 -- Doug Fults 506838 -- Thomas Mc Namara (USA) 506849 -- Peter Hobbs (UK) 506875 -- R. N. Labas - (Chile) 506936 -- David J. Friedlander 507001 -- Matt Ackermann 507175 -- Robert Adam 507206 -- Harold Urmston 507214 -- Robert Leiding 507435 -- J. Mc Dade 507435 -- Richard D. Boltuck 507475 -- Skip Hudspeth (USA) 507640 -- Craig Seeley 507656 -- Robert Tiffany 507968 -- Les & Lisa Van Horn 507976 -- JackChristensen (USA) 508085 -- Skip Godfrey (USA) 508286 -- William J. Godecker 508311 -- Malcolm Brooks 508642 -- Rick Stanard 508629 -- Rex Cornforth (USA) 508727 -- Tony Arnold 508835 -- Michael Terry 508839 -- Jimmy Walker 508851 -- Ken Sanford (USA) 508890 -- Hal Antonson 508954 -- James Black 508978 -- Art Rosen 508991 -- David Bonnes 509156 -- Tom Grimshaw 509257 -- Daniel Lewin 509304 -- Steve Willey 509318 -- Rodd Jones 509452 -- Ron Jones 509760 -- Joel O'Rourke 509808 -- Burt I. Weiner 509891 -- Stanley Siegel 509999 -- Andrzej Zbojnowicz 510241 -- Thomas Mc Namara (USA) -- PrimeNumberCurta 510292 -- John Bellefleur (Canada) 510305 -- Donald Rosen (USA) 510365 -- JackChristensen (USA) 510392 -- Takashi Tanemura (Japan) 510395 -- Kate Ednie (GB) -- Highest known Black Body 510633 -- Donald Rosen (USA) -- Lowest known Gray Body 510675 -- Jorge L. Pang A. 510993 -- Ole Steen 511181 -- Rick Blake 511185 -- Paul Amos 511212 -- A Sargeant 511219 -- Chris Grow 511486 -- Victor Kuhl 511622 -- Fabio Caruso 511682 -- Enrico Panfili 511697 -- Tim Winker 511884 -- Thomas Mc Namara (USA) 512045 -- Steve Willey 512225 -- Kathryn Hansen (USA) 512263 -- Chris Lott 512265 -- DennyHardy (Europe) 512304 -- Paulo Boselli 512407 -- Michael Meissner (Germany) 512435 -- Jorge Garcia Sanchez (Spain) 512529 -- Peter Schneider (USA) 512687 -- Gary W. Gerfen 512709 -- Peter Hobbs (UK) 513025 -- John Nice 513109 -- Richard Moor (USA) -- PrimeNumberCurta 513115 -- Greg Finn 513279 -- Tullio Parravicini 513431 -- Granville Knox (USA) -- PrimeNumberCurta 513555 -- Bryan C Cloud 513709 -- Richard Freedland 513710 -- Paul Delmote 513923 -- Jay Bayanker 514112 -- R. N. Labas - (Chile) 514128 -- Jacques B. Gros 514228 -- MSG Larry Turley 514266 -- Peter Hobbs (UK) 514406 -- Jorge Garcia Sanchez (Gold demo) (Spain) 514508 -- Richard Barnhart 514533 -- Waldbauer Helmut 514658 -- Pepper S. Younts (USA) 514680 -- Brent Ayscough 514686 -- JackChristensen (USA) 514709 -- John H. Eells 514725 -- Jim Bell 514736 -- Clifford Bruhn 514794 -- Peter Schneider (USA) 514884 -- Waldbauer Helmut 514939 -- Andrew Prusek (AU) 515300 -- Dana G. Tremblay 515693 -- Henry F. Tutt 515737 -- Skip Hudspeth (USA) -- PrimeNumberCurta 515906 -- Peter Hobbs (UK) 516005 -- Gerard F. Schaefer (USA) 516080 -- Harold W. Harmon 516815 -- Peter Hobbs (UK) 516839 -- Clay Castleberry 517064 -- Peter Hobbs (UK) 517170 -- Jim Milstein 517305 -- John Favill 517327 -- R.S. Clymo 517561 -- Joseph Williams 517934 -- Dr. Sid Kolpas 517987 -- Scott Harvey, Jr. 517994 -- Steve Terry 518330 -- Robert Adelstein 518485 -- David Owensby 518518 -- Glenn Herman 518556 -- Mike Rowley 518792 -- Pepper S. Younts 519306 -- William B. "Skip" Freely 519445 -- James Black 519983 -- Leland May 520008 -- Craig Mac Innes 520730 -- Steve Willey (USA) 520886 -- Dale Intolubbe (USA) 520745 -- Peter Mabey 520854 -- Charles L. Webb 521043 -- Roger Warling 521094 -- Ralph Beckman (USA) 521415 -- Steve Lower 521603 -- Larry Walsh -- PrimeNumberCurta 521802 -- Rick Bensene 522528 -- DennyHardy (Europe) 522545 -- George Huffman (USA) 522727 -- David Senkfor(USA) 522769 -- Mery Christophe 522934 -- Ralph Beckman (USA) 522954 -- Lee Sorenson 523053 -- Barry Sale (USA) 523129 -- Douglas Palenshus--sold in 2001 to Bellevue, WA enthusiast 523229 -- Josh Fisher 523847 -- Keith Ward -- PrimeNumberCurta 524082 -- Jerry Walker (USA) 524175 -- John Hinkamp 524265 -- Hiromi Chiyoda 524336 -- James H. Glueck 524391 -- Joe Mc Glohen 524581 -- Rod Sorenson 524619 -- Stephen Glover 524957 -- Adam -- PrimeNumberCurta 525059 -- Dov Gadot 525190 -- Scott Sprague 525329 -- Nick Chapman 525581 -- Steve Castleberry 525601 -- Dave Wheeldon 525638 -- Del Andreini 525645 -- Les Talcott (USA) 526143 -- Les Talcott (USA) 526157 -- Louis Skelton, Curator at The Keenan Collection -- PrimeNumberCurta 526339 -- Allen Berman 526406 -- Grant Paton 526640 -- Alex Poylisher 526651 -- Steve Green (UK) -- "TwinPrimeCurta"; the higher of its twin prime 526649 526699 -- Rick Furr -- USA 527054 -- Ramon Fregoso 527207 -- Gerard F. Schaefer (USA) -- "TwinPrimeCurta"; the lower of its twin prime 527209 527348 -- Mark Butterworth 527369 -- Dave Aitchison (Australia) 527534 -- JackChristensen (USA) 528118 -- Matthew Presnal 528184 -- Herb Gold (Demo model) 528229 -- David Senkfor (USA) 528397 -- Bob Lockey 528478 -- Steven C. Ross (USA) 528684 -- Michael L. Harmon (USA) 528756 -- Billie G. Smith 528813 -- Fred Kroll 528872 -- Herb Engstrom 529069 -- Alfred Werra 529115 -- Markus Rustemeyer 529659 -- Paul Van Hoof 529668 -- Donald Rosen (USA) 529687 -- Harold Mernick 529860 -- Francisco Ruiz (Mexico) pena2528@hotmail.com 530023 -- Charles M. Howard 530070 -- Mike Daley 530155 -- Registered Land Surveyor 530498 -- Les Kerr 531123 -- Cris Grunca 531203 -- Paul Catchpole (New Zealand) -- PrimeNumberCurta 531827 -- Wolfgang Deppenmeier -- PrimeNumberCurta 531993 -- Jay K. Jeffries 532235 -- Robert Calliau 533039 -- Tadamitsu Gamazawa 533418 -- L. Verity 533914 -- Robert A. Pearce 533946 -- Jo & Jim Hurley 533953 -- Harrie Wolters 534332 -- Stuart L. Wayne 534385 -- Michel Miklaszewski 534433 -- Bill Hood 534622 -- JackChristensen (USA) 534762 -- Helge Reisch 535153 -- Doug Thiedecke 535297 -- Nick Ridgeway 535469 -- Pearu Terts 535535 -- James Weightman 536087 -- A. B. Bonds 536131 -- David Bannister 536131 -- John H. Eells 536161 -- Daniel Gross 536176 -- Chuck Cavanaugh 536438 -- Scott Norton (USA) 536689 -- Ira Meislik 536734 -- Ken Whitson 536759 -- Rich Scholl 536848 -- Gordon Ball (USA) 537078 -- Adams Douglas 538236 -- David Bannister 538310 -- Pepper S. Younts (USA) 538365 -- Paul Krisman 538415 -- John A. Smith 538416 -- Peter Hobbs (UK) 538446 -- Chad 538659 -- Tony Brown (USA) 539041 -- Dennis Farr 539157 -- Tim Humphries 539233 -- Donald Rosen (USA) -- PrimeNumberCurta 539261 -- Pat Huet 539399 -- Joseph A. Charles 539451 -- Steve Richards 539464 -- David Senkfor (USA) 539629 -- Kirby L. Crawford 539787 -- Leo Theron 540329 -- Charles G. Hanson (USA) 540430 -- Mark Crocker 540681 -- John Bellefleur (Canada) 540738 -- R Monaco 540782 -- Jim Walpole (UK) 541163 -- Grant Youngman 541172 -- Franz Schuler 541184 -- Jonathan Wall 541447 -- Ed Lake 541599 -- Eric Teutsch 541614 -- Thomas Mc Namara (USA) 541633 -- Miki Mihajlovic 541735 -- Joe Webber 541758 -- David Kay 541833 -- Mark G. Leonard 542072 -- Roger David Coleman 542322 -- Lloyd Albright 542379 -- "skeleton" model 542539 -- Guy Rowinski 542608 -- James Mc Dermaid 542826 -- Lin Hsin Hsiung 542883 -- Bill Drude 543040 -- Rick Trafford 543126 -- Robert Hinchley (Canada) 543169 -- Ed Sharp 543190 -- Allan Gough 543379 -- Thomas Mc Namara (USA) -- PrimeNumberCurta 543402 -- David Bannister 543471 -- Reyn Rich 543652 -- Peter Johns 544167 -- Gary D. Snyder 544430 -- Peter Hobbs (UK) 544447 -- Robert R. Kim 544631 -- Cris Vande Velde 544783 -- Steve Richards 544857 -- Nigel R. Tomlinson 544911 -- Benson Miller 545430 -- John Low-Shang 545546 -- Ron Goldsack 545619 -- Herb GOld 545773 -- William J. Schull (USA) -- "PrimeNumberCurta" 546251 -- Al Axelband (USA) 546283 -- Mohammad hamideyn 546616 -- Nathan Orenstein 546692 -- John Cherry 546763 -- Rudy Penteado 547205 -- Susan Bastian (USA) 547347 -- Claudio Abaecherli 548103 -- Stan Alter 548268 -- Yves Drillet 548379 -- Jami Buchet 548726 -- Lorenzo Altese 548914 -- Nat Edgar 549518 -- Mery Christophe 550040 -- Wayne Loudermilk 550092 -- Dr. Brian Levy 550120 -- Stan Stanley (USA) 550125 -- James Bowlin 550865 -- Jim Weil 551014 -- JackChristensen (USA) 551183 -- Juan S. Perez Diaz 551188 -- Walt Kammer (USA) 551663 -- Rod Sorenson 551666 -- Dufour Remy 551752 -- Philip Twine 551956 -- Mery Christophe 551957 -- Mery Christophe 552457 -- Nick Pritchard 552808 -- Steve Richards (USA) 552856 -- Dr. Jeffry Luria 552899 -- George E. Heath 553266 -- Gordon Matzigkeit 553304 -- Corry Kerstens 553385 -- Phil Symons 553673 -- Eugene F. Hari 553720 -- Stephen Hunt 553736 -- Daniel Kuras 554758 -- Doug Boone 554764 -- Tim Winker (USA) 555268 -- Malcolm Brooks 555251 -- Dave Coppard -- PrimeNumberCurta 555406 -- Donald Rosen (USA) 556023 -- R. Brian Andrews (USA) 556031 -- Maciej M. Syslo (Poland) 556053 -- Max Hyre (USA) 556074 -- Michel Haebrard 556327 -- Frederick (Rick) Ide 556951 -- Lazare 557211 -- Kamala Krishnan 557358 -- Ted Taylor 557360 -- Donald Rosen (USA) 557607 -- Donald Rosen (USA) (Demonstration model) 557727 -- Gail Oliver 557754 -- Ken Seydel 557762 -- Hull Family 557842 -- Marcel Chichak 557864 -- Dushan R. Divjak 557879 -- Mery Christophe 557889 -- Bob Barns 558006 -- Douglas Hicks 558025 -- Ken Wiedbusch 558124 -- Bill Taylor A.S.C. 558135 -- Ric Goldtrap TSCC 558189 -- JackChristensen (USA) 558273 -- Shalom (Dick) Tsur, Ph.D. 558275 -- Peter Hobbs (UK) 558399 -- Gary Caplin 558419 -- Paul S. Pace, P.L.S. 558450 -- Nigel J S Steward 558512 -- Tom Poole 558551 -- Sean Tudor 558647 -- Donald Rosen (USA) 558662 -- Peter Hobbs (UK) 558711 -- Pepper S. Younts (USA) 558761 -- Eric Norman 558939 -- Herman Brauckmann 559891 -- Ken Sanford (USA) 560051 -- Felix Schaefer 560566 -- Thomas Stocker 560608 -- Dr. Rutger Verbeek 560754 -- David D. Stone Sr. 560780 -- Christopher Kaine 560781 -- Prof. Emeritus Robert A. White (USA) 560809 -- Roy Levin (USA) 561213 -- Andrew Koenig 561314 -- David Owensby 561417 -- Peter Hobbs (UK) 561447 -- Pepper S. Younts (USA) 561655 -- Werner Schaefer