Bidspirit auction | United States - Air Post

United States - Air Post stamps and covers - 1938, Eagle Holding Shield, 6c ultramarine and carmine, color variety, centerline block of four, strong colors and nice centering, full OG, NH, VF and scarce item, Bruechig guarantee hs and penciled position numbers on reverse, C.v. $1,200 , Sc. #C23c