Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 172:
1913, Solothurn, 50c claret, horizontal pair with strongly misplaced vertical perforation, full OG, NH, VF, small handstamp guarantee on reverse, SBK #XI, CHF1,000 as two common singles, Est. $300-$400
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