Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1501:
HIGHLY VALUABLE COLLECTION: 1918, black or violet overprints of types 1 and 2 on 246 mint and used (105) stamps in singles, pairs, strips and blocks, among better: type 1 – perforated singles of 1k, 10r and postal saving 5k, perforated blocks of four – 7k, 10k/7k and 35k, numerous rarities of type 2, a beautiful unit, full OG or used, F/VF, ex-Dr. Seichter and Dr. Zelonka, Bulat #942/1057, C.v. is $12,000 plus 4 stamps priced with ”-”, Est. $4,000-$5,000
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