That’s some cool old Interarms stuff from back in the day when they were selling everything to everyone and skirting end user certificates just about everywhere.
That would have been some ancient expired East Bloc stuff that they got a scrap deal on and put in their own boxes. Betting sold in USA in early 80s.
Good ammo. Corrosive and almost certainly Berdan primed.
I think some folks for Interarms went to jail, IIRC. They also sold and brokered a ton of ammo to South Africa (despite the embargo), Dominica, Nicaragua, Afghanistan (well done, Mike Vickers), and every other small war from 1965 until the late ‘80s.
They had their own brands... and sold a ton of guns in USA. But that was small potato’s compared to international arms trading.
Sirhr