I'm wondering what the glassmaker would be for a Rolling Rock bottle from 1943 that has an A inside of a triangle. Normally the maker would be Anchor Hocking so this doesn't make any sense to me. I know Brockway also made some too but that's not a Brockway symbol.
It's not a modern bottle. Hopefully I know the difference between a bottle made after 2011 and one from 1943. Or I should get out of collecting bottles. It has "Internal Revenue Tax Paid" on the front.