New-to-me HP-71B

[grsbanks]

(11-26-2019 09:21 PM)Dave Frederickson Wrote:  The correspondence of serial numbers to dates is only approximate.

Understood. From that page:

Quote:YYWW is not always exact and sometimes may have gone weeks or months without changing

That being the case, 2422 could be late May or any time thereafter until HP decided to change the week number again... Unless they preemptively started labelling calculators as from week 22, 1984 some time before that date.