So, me and iR0b0t really can't agree on this.. what is it? a letter or a number? is it OMM or 0MM in the picture?:

Personally I think it's a letter, because of how wide it is (if you see the zero on the left then it looks clearly different.. it's more narrow).. OMM probably means 'Optical Media Manufacturing' which is the name of a large replication plant. Then again, the 0 of A05 looks the same, so maybe the machine is using the same character for 0 and O.
This is not a contest and there won't be any winners, but we just want to record this accurately in the db.

