Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1154:
1909-12(c), 7k light blue, perforation L14½, typo printing on wove gummed paper with privately made varnish lines, fresh quality, VF, an issued stamp is added for comparison, Est. $400-$500, Sc. # 78
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