I have two rounds of rare 60 caliber machine gun ammo. They were used on USAF planes in the sixties I think as a more effective round than 50 cal.
They weren't around long as the ammo was destroyed in the early 1970s.

One round is black tipped AP. I'm not sure what the other is. If tracer, I'm not sure it can be shipped.

Is anyone interested enough in acquiring them to pay for UPS shipping, probably $15 plus $10 each?

I would be interested if you still have them