Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1240:
1916, ¼pi green, perforation 12, and 1pi blue, perforation 10, two top sheet margin blocks of 6 (2×3), the last one pulled one tip of perf at bottom, fresh, unused, no gum, C.v. $480 as hinged singles,Scott #L1, L3
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