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I did a quick search on the museum for the "latest HP-41C" and didn't see anything.

I know we track the earliest, but how about the last?

Are you looking only for the 41C? Or the whole family, C, CV, CX?
I have a 41CX made in Singapore in 1990 week 26 :

More to "when was the last 41C made?"

Ref: "A guide to HP Handheld Calculators and Computers" book from Wlodek.
41C -> Introduced: 1979-07-01 & Discontinued: 1985-01-01
41CV -> Introduced: 1980-12-15 & Discontinued: 1990-01-01
41CX -> Introduced: 1983-10-01 & Discontinued: 1991-11-01
Now I understand that those dates are not the manufactured dates, but its a starting point.
Sylvain

Ah Ha!

That is good. I have a flatter, thin box for the 41C, (like many 41CX's) but no calculator. Manuals are 1983.

I don't think they made very many like this before discontinuing the model

(04-16-2016 12:55 AM)Sylvain Cote Wrote: [ -> ]41CX -> Introduced: 1983-10-01 & Discontinued: 1991-11-01

Gene: It might be interesting to see HP 41CX serial numbers that started with 31XX. Not sure I've seen any that late myself.

(04-16-2016 12:55 AM)Sylvain Cote Wrote: [ -> ]Ref: "A guide to HP Handheld Calculators and Computers" book from Wlodek.
41C -> Introduced: 1979-07-01 & Discontinued: 1985-01-01
Sylvain

I always remembered the 41C being introduced on July 16th rather than July 1st, so I checked the HP Key Notes and PPC Journal and got confirmation there. Here is the cover of HP Key Notes V3N3 (Aug 1979):



...and here is PPC Journal V6N4P7, showing two Hewlett-Packard press releases:




Jake