Mostly..Probably dates to around the Teens. Maybe 20's at latest. LEON.
Very nice to see sparkling-clean bottles of any vintage. That's the way to present them.
Yes, but with a few exceptions: early flasks with ground lip, cork closure with a threaded over-cap (shot glass, dose cup and etc.) and tooled internally threaded lip as found on the Crown Distilleries Whiskey bottle and a few others.