Vietnam US Air Force 310th Air Commandos STYRON'S STALLIONS Cowboy Boonie Hat & Calling Card. Standard Vietnamese made tan cowboy hat with the screened vents. Sewn around the crown is a purple silk like band. Sewn to the front is a Vietnamese hand embroidered 310th Air Commandos patch. On the left side is a silk woven VIET-NAM tab. Stuck in the hat band is a USAF Lt Colonel's calling card. This is one I don't have in my collection and was very hard not to pull it out and keep it. Small size. Great condition.