50g - Differences in production batches

[cdmackay]

For what it's worth, I have two units that are supposed to be from the final 150-unit batch supplied by HP Europe, in late 2018; they are:

CNA62800M0

CNA62800JR

edit: when registered at HP, the site reported for both a warranty date of 16th July 2016, which is indeed in week 28