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瑞士 1936 - Pro Patria 区块的组合,通过带有 FDC 印章的挂号信和特快信函进行组合 - 免费
编号 81207061
编号 81207061
Lot of 4 covers : Sonderluftpost : Special Airmail Pro Aero : Zürich - Bern and Bern - Zürich
Blue special chachet "30 Jahre Alpenflug 13.VII.1913 .........."
2 registered and one registered-express
There are all FDC because of the 1 franc stamp 1943 Airmail - Special Flight Pro Aero 1943, issued on July 13th