EUC Vintage 1970s Sterling silver charm bracelet

Marked PAT with a series of #s. Not sure what this means I included pictures of other bracelets with charms to show you how its supposed to work but mine isn't the exact same bracelet You press on the clasp to open and close it. It snaps into place and there's a clasp shut mechanism for extra security Request closet clearout on a friday or sunday to receive discounted shipping if you buy within 6 hrs of the price drop