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Serial Numbers and Production Dates
04-03-2017, 09:27 PM
Post: #1
Serial Numbers and Production Dates
I seem to recall once seeing a table that showed how to read serial numbers on classic HP calculators to get the month and year it was manufactured. Can somebody point me to the table or website?

Thanks.


Regards,
Bob
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04-03-2017, 09:33 PM
Post: #2
RE: Serial Numbers and Production Dates
The older numbers prior to China:

aabb@xxxxxx

60 + aa = year

bb = week

@ = country A - America (U.S.A.), B = Brazil, S = Singapore, M = Mexico. Others can add to or correct my country codes.

xxxxxx = serial number.

2152A123456. Is 1981, 52nd week, America, # 123456
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04-03-2017, 09:57 PM
Post: #3
RE: Serial Numbers and Production Dates
(04-03-2017 09:27 PM)bshoring Wrote:  Can somebody point me to the table or website?

Geoff covered the most answer you likely need, but there is a bit more here on machines in more recent years:

http://www.hpmuseum.org/collect.htm#numbers

--Bob Prosperi
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04-03-2017, 09:58 PM (This post was last modified: 04-03-2017 09:59 PM by james summers.)
Post: #4
RE: Serial Numbers and Production Dates
I think M is Malaysia.

See also the Museum's article on serial numbers, scroll down for the eatliest recorded ones for each model.

Edit, oops, cross post!
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04-03-2017, 10:19 PM
Post: #5
RE: Serial Numbers and Production Dates
Thanks, everyone!

It looks like my HP-80 (1247A) is from the first week of production. My HP-35, type 4 (1346A) is from the second week of production of type 4.

Most interesting.

Thanks!


Regards,
Bob
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