St Thomas and Prince Islands 518-519 imperf

Saint Thomas and Prince Islands 518-519 imperf, MNH. Michel 583-584, Bl.35B-36B, Euros 105.00. Sir Rowland Hill: 1st air mail flight Lisbon to St Thomas, 30th Ann. DC-3 Dakota. BRASILIANA-1979, Airship Graf Zeppelin. UPU emblem, Maps.