Stamps Situation Interchangeable

B571 ? Lockheed Superconstellation
Manuel Briones
B560 - Junkers W33 Bremen
Manuel Briones
B552 ? Grade Monoplane
Manuel Briones
B552 ? Grade Monoplane
Manuel Briones
1368 - Commercial IL - 62 (DDR)
Manuel Briones
1367 - Agricultural Plane Z - 37 (DDR)
Manuel Briones
1038 - Leipzig Autumn Fair (DDR)
Manuel Briones
2930 - CXXV Anniversary of Otto Lilienthal's First Flight Attempt
Manuel Briones
1641 - History of Postal Transport by Air
Manuel Briones
1639 - History of Postal Transport by Air
Manuel Briones