HP35s Serial Numbers Interesting Observation

[MarkHaysHarris777]

I have been doing some analysis of the 35s with cross ref between two distinct units (not emulator). I finally got around to scribing my name on the back-plate, recording the serial numbers, and registering the products with HP.

I noticed something interesting; each of them has the same serial number sticker!(?)!

unit A: CNA44716YZ

unit B: CNA44716XZ

What is wrong with this picture? They only differ by the next-to-last character X vs Y

Is it really possible that these two units were manufactured in the same week, year, lot?


marcus