HP 41c STAT 1 module version 1A

[rprosperi]

(09-15-2021 02:17 AM)dmh Wrote:  Definitely would have been for bug fixes. I note that some of the alpha prompts have characters transposed in the 1A version.

Given the Service Manual extract above it sounded like 1A was never released for sale. Maybe it was made for the 41c release but too many bugs were discovered and it was never sold? The PPCJ was a release announcement so would have been prepared before the release so may not have been the STAT module that actually went on sale.

Well, you have the 1A module, you tell us - does it look like a production module, with sonic-welded case seems, production level lettering, engraved date code (what is the full code?), etc. If it has all these elements, then it very likely was a production unit that was sold. Early pre-production modules typically were hand-glued, with crude labels, no date codes engraved, etc.