Lot 40250 – 1946 CURACAO Airmail postal stationery envelope USA 5c + 5c additional fkg from Chicago to Curacao and return franking 15c Airs Curacao

1946 5c Airs USA tied to US postal stationery envelope 5c from Chicago to CURACAO and returned with Curacao airmail 15c with postmark VILLEMSTAD 5.11.46 alongside red ‘RETURN TO SENDER’, so-called PANAM test cover to check the airmail transport duration, very fine, scarce.