Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Liberia - 1941, First Flight Liberia - US, black surcharge 50c on 1c green, nicely centered, full OG, light trace of hinge, VF and very rare, only 43 stamps were produced, several guarantee hs on reverse, including J. Stolow, C.v.$3,250, Est. $1,200-$1,500 , Sc. #C17