HP-50G case puzzle

[cdmackay]

one thing I thought about the warranty checker for mine was that it showed a warranty start date that matched the YWW part of the serial number.

Surely a warranty should start when I bought the item, not when it was made?

I wondered if this was because the 50g was already discontinued when I bought it.

[for peace of mind, Oxford Edu offered 2-year warranty on it regardless, although whether HP would honour that were a repair needed, I wonder… ]