HP serial numbers

[BruceH]

(03-13-2022 06:44 PM)PeterG Wrote:  I have had experience of working in a factory in 1944 (I am 91) and at that time assembly lines had to be kept going for maximum efficiency.

That's very true and the 15C assembly line may well have been kept busy by switching it over to making batches of 12Cs or 11Cs.

The test would be to compare serial numbers of 10s, 11s, 12s and 15s: if the above were the case then you wouldn't expect to ever see two different models manufactured in the same week.

(I'll caveat that by saying that 12Cs were made in such large volumes they probably had their own line.)