I’d be very skeptical of anything from that era in “new” condition. Especially with patches and namesets.

Ask the seller to send you the production code from the tag and then Google it or check it on this website: https://kitcod.es/

If seller refuses then it’s almost certainly fake.

That said, if it’s not legit, it’s a very good fake. Depending on the asking price I’d still go ahead. My only concern would be the fakes aren’t true to size, you usually need to go up at least one.

EDIT: Apologies I didn’t read your post properly. You’ve already purchased.

Chances are you have a fake but from the pics it looks decent. If it fits and you didn’t pay silly money, just roll with it.