HP-50G case puzzle

[BartDB]

Another data point:

CNA9020xxxx

purchased in 2009. Does not have the marking on the back.

As for the length of the serial numbers, it seems the older serial numbers are longer with numbers only whilst the newer shorter ones have letters as well.

(12-04-2018 03:02 AM)cdmackay Wrote:  Surely a warranty should start when I bought the item, not when it was made?

Yes, which is why it is important to keep the purchase receipt (with serial number recorded) as proof of date of purchase.

As for "latest serial #" and "last manufacture":
Note that units probably get serial numbers when they are packaged, this may be many months after they have actually been produced. Also different parts may have been produced in different places, stockpiled for months before they actually get assembled into complete units. It could then be a while before the units get programmed, tested, serial numbered and packaged. So there can be quite a disparity between "when production ceased" and "when the last serial number was printed and applied".
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