Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1406:
1922, registered cover from Boguslav to Berlin via Moscow (Dr. Brender’s correspondence), franked on reverse by upwards surcharge 7500(r) on Saving stamp of 5k in block of four, watermark Vertical Diamonds, Berlin arrival, minor soiling, F/VF and scarce real commercial cover, Raybaudi certificate, Est. $400-$500, Sc. #85
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