Place your bets on the value

[grsbanks]

(11-12-2018 09:58 PM)burkhard Wrote:  Serial number 1143A XXXXX on the auctioned one seems *really early*

In the beginning at least, HP were not as diligent in updating the serial numbers and would only do so when there was a significant change in design or if they ran out of numbers after the country code.

There's a huge number of HP-35 machines with serial numbers that start with 1143A (mine does too and it's not a red dot) so that is not a good indicator of its manufacturing date even though it's meant to indicate the year and week.