Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 73:
1912, Rhine-Main Air Mail, 30pf deep green on pale gray paper, bottom right corner sheet margin block of four, full OG, NH, VF, C.v. $390++, Mi #III, €520++, Est. $150-$200 , Sc. #CL3
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