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WORLDWIDE AIR POST STAMPS AND POSTAL HISTORY
RUSSIA AND SOVIET UNION
Lot # 125 | U | Scott # C73a
| 1937, Aviation Exhibition, Twin-Motored Airplane, 50k dark violet and black, vertical pair imperforate between stamps, neatly cancelled, VF and rare, C.v. $4,500, Est. $1500-$2,000 . |