Image 1 of 3 Image 2 of 3 Image 3 of 3 Original US Vietnam Field Cap, dated 1966. £28.00 An original US Vietnam Field Cap, dated 1966, size 7 1/8.This item is in very good condition. Add To Cart Added! An original US Vietnam Field Cap, dated 1966, size 7 1/8.This item is in very good condition.