Disclaimer - I'm not an expert in antiques, just stuff I've learned from observation and general metalworking and crafts knowledge.
Supposedly wormholes can be one of those character aspects that increase value in some cases though of course it'd be so long as it's not an active process and it's not compromised the integrity of the piece in any big way.
Assuming it was imported, they'd not allow it in with an ongoing pest problem and there's a chance it might have been irradiated and/or had a pest treatment in quarantine.
Nails from years ago also tend to be handmade in some cases - generally that's blatantly obvious, they'll usually be beefier than you'd otherwise think necessary and have rectangular heads. Though of course for a fashionable item they'd probably put more effort into making them look less industrial.
- komuso likes this