I wasn't worried. I knew the bag was authentic but this was the first time I'd see that particular plant code on a DR bag. I counted it as another picture to add to my library.I've seen A8H- prefixes mostly in US bags but it could be another floater that went wherever it was needed. I gave up trying to figure those out a long time ago. At that point Coach probably didn't care what got stamped with what because they were planning for the move to China. If the rest of the bag is ok, don't worry about it. I don't.
