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Auction: 8031 - Stamps and Covers of the World
Lot: 1117

x Switzerland Airmail 1919-20 propeller overprint 30c. (lower marginal) and 50c., used blocks of four cancelled with neat "schweizer flugpost" double ring last day datestamps. Liniger Certificate (1973). Very fine and rare. Zumstein 1-2, Sfr. 18,800. Photo Estimate £ 2,500-3,000

Sold for
£1,800