What is the ML number on the amp?
What is the PR number on the amp?
Do these numbers match on all your amps?
Are the oil levels all the same and sitting pretty much right at the Sustanon print on the amp?
Is the "g" in the Organon logo ON the amp the same font as on the Organon logo on the box? i.e. not a straight g but more like: g
Is propionate spelled correctly?
Did you get your inserts with the boxes?
And do all the boxes say 1x Amp on them? Not 3 or 6 etc.
For the record my batch numbers and expiry dates DO NOT rub off. Even with some spit and a finger nail they will not budge. I am pretty certain that on a pharmaceutical product they will be manufactured in such a way that the expiry date does not easily come off as it's not a detail that can be compromised in the pharmaceutical industry. I highly doubt Organon would risk expiry dates that come off simply with a rub.
These are many of the aspects I've encountered while trying to determine the real amps from the fakes. Other than these guidelines the only way of knowing for sure is by trying! Goodluck.