I bought on eBay a very nice HP-41C with the earliest S/N I ever seen... 1926A00278! The display was becoming black so I replaced it with another (from another early 41C, S/N 1932...) and now the calculator works perfectly with all its original bugs and a perfect case and keyboard.
On the Collector's Corner the earliest S/N for the 41C is 1930, but mine is 1926 and moreover the final number is extremely low so if the total production raised the million my 41C might be produced the first day of production (assuming 300 units produced each days, the grand total is 1.095.000 for 10 years of production)?
Thanks!
Gian