I dunno man, are all the oil levels in the amp's the same? And it looks like the white ring around the neck differs between them? Is that lot and date stamped in the same ink as the rest of the label? If so, I doubt they were made by Norma. And from these pictures, it looks like the whole "label" was stamped in one go for all the amp's which would be impossible for a pharmaceutical production line (ie. they would never stamp every amp with the same lot and date before being filled as they often switch lots multiple times between processing - therefore, the lot and dates are stamped on the amp's just as they are about to leave the line, after they are filled, and sealed, and usually with a laser print).
Big pharma will not make such mistakes.
All the best