HP-12C serial number check

[striegel]

There is a web site that will tell you the warranty date for HP products, although sometimes knowing just the serial number is not enough. In that case, you also need a product number, which isn't always obvious.

https://support.hp.com/us-en/check-warranty

In this particular case, I was able to find that this HP 12C was provided with its factory warranty starting 2017-09-19. I had to know a likely "Product" number for this was F2230A.