Airmail Covers

Quality: ✉

1937 PA 1 and PA 4 (2x) “50c. red-orange” and “5fr. green” from an airmail envelope on an international money order sent from Costermansville on 2 July 1937 to Brussels; as the item was postage-free, only the airmail fee was paid, with a handwritten note “15gr./10.50” and a cancellation on the reverse “BRUXELLES MANDATS 20. II.37”, a rare item, very fine