Rick Furr operates the "Curta Calculator Page" web site, as well as an HP calculator web site.
http://www.vcalc.net/cu.htmOn the Curta Calculator site you will find a registry list of over one hundred Curta owners. Rick has maintained this list for many years, requesting that the owner detail the manner in which they have obtained their Curta(s). Some of their stories are fascinating. Why not visit Rick's site and submit your own story?