Need Help Verifying an Audemars Piguet Royal Oak at Auction

Hey everyone,

My husband is going to an auction, and this Audemars Piguet Royal Oak is one of the items up for bid. The auction organizer is reputable, but for this specific item, the authenticity hasn’t been verified—it’s up to the winner to check.

We’ll be going in person on the viewing day, but I’d like to confirm beforehand so we don’t waste time on it. Can anyone here tell if this watch is legit? And what details should we look for when we check it out in person?

Thanks in advance!