Are you referring to the ground stopper? That's how they are made.The mouth of the bottle and the tapered part of the cap shows plenty of wear and tear.
Are you referring to the ground stopper? That's how they are made.
Not to disagree with Harry, that is true but I think this may have had more a laboratory use than pharmacy.
Testing edit https://www.sha. .org/bottle/closures.htm#Glass
Ok, that was a half hour this is 45 minutes, I think plenty long enough.