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Sebastian
Joined: 11 May 2014 Posts: 41 Location: Germany
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Posted: Sat Nov 12, 2016 8:09 pm Post subject: original Curta? |
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Hi everybody,
this Curta is my first one - it was given to me by my oncle, who owned it for a long time. He got it from a coal mine, where it barely was used. Its serial number is 11140.
Some time ago I determined that the clearing lever is screwed instead of beeing riveted. Also the screw on the knob is in a lower position which only the early ones had.
So how can it be?
![](https://c1.staticflickr.com/6/5727/30636884376_a19583368f_h.jpg) _________________ Type I
5023
8121
11140
22146
22961
22983
26713
66561
80151
Type II
500438
502852
507157
509135
555001
555476 |
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murff
Joined: 27 Oct 2009 Posts: 594 Location: Switzerland
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Posted: Sat Nov 12, 2016 9:32 pm Post subject: |
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I think this is an all original Curta... (and a very nice one by the way...)
The screw / rivet mounted clearing rings are not directly assignable to a range of serial numbers - but most of the earlier Curtas are screwed.
And the position of the screw is also a variation which is not explored now (...) _________________ :: m u r f f
:: curta.li |
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Sebastian
Joined: 11 May 2014 Posts: 41 Location: Germany
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Posted: Sat Nov 12, 2016 9:56 pm Post subject: |
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Hello Murff,
do you really think it's original?
My 5023 is also screwed and the screw of the knob is in the lower position, but my 8121 is riveted and the screw is not in the lower position.
5023
8121
![](https://c7.staticflickr.com/6/5649/30042066574_7b6a700dcf_h.jpg) _________________ Type I
5023
8121
11140
22146
22961
22983
26713
66561
80151
Type II
500438
502852
507157
509135
555001
555476 |
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Back to top |
|
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murff
Joined: 27 Oct 2009 Posts: 594 Location: Switzerland
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Posted: Sat Nov 12, 2016 10:11 pm Post subject: |
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Cranks and clearing levers are the most damaged and replaced parts on a Curta.
So it happens that a crank on an early Curta is replaced with a later type. And as I know the srewed clearing levers where always replaced with a rivet mounted lever.
So nothing wrong with your Curta...
except maybe the chrome crank? ![Very Happy](images/smiles/icon_biggrin.gif) _________________ :: m u r f f
:: curta.li |
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murff
Joined: 27 Oct 2009 Posts: 594 Location: Switzerland
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Posted: Sun Nov 13, 2016 9:39 am Post subject: |
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in addition I checked some Curtas:
production date
-- clearing rings mounted with srew or rivet
-- knob on crank, screw position borttom or middle
February 1948 -- screw -- bottom
May 1948 -- screw -- bottom
November 1948 -- screw -- middle
November 1949 -- rivet -- middle
June 1951 -- rivet -- bottom
January 1952 -- rivet -- middle
so... also a mixed picture
but in general older Curtas have a screw mounted clearing ring and the screw position is at lower area of the knob - no exact serial numbers known... _________________ :: m u r f f
:: curta.li |
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Sebastian
Joined: 11 May 2014 Posts: 41 Location: Germany
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Posted: Sun Nov 13, 2016 11:18 am Post subject: screwed vs riveted |
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Hello Murff,
thank you for your investigation, but you see, a Curta with S/N 11140 should be riveted.
Who knows what they have done at Contina - perhaps they had parts left of earlier production and reused them. _________________ Type I
5023
8121
11140
22146
22961
22983
26713
66561
80151
Type II
500438
502852
507157
509135
555001
555476 |
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Juliogmz
Joined: 05 Mar 2017 Posts: 1
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Posted: Sun Mar 05, 2017 11:11 pm Post subject: Is my new Curta an orginal one? |
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murff
Joined: 27 Oct 2009 Posts: 594 Location: Switzerland
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