Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 910:
1923, black surcharge 10m on Airplane 5m+5m yellow, black and light green, Aeronaut (Paevaleht) original perforation 11½, full OG, previously hinged, VF and very scarce the ”key” value of the Estonian Air Post, only 300 stamps were perforated (certificate says – 400), T. Loebbering certificate, C.v. $650, Est. $500-$600, Sc. #C7
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