Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1063:
1925, Arabic Numerals, imperforate proofs of ½pi-3pi, complete set of four, left sheet margin singles with double impression,, full OG, VLH, VF and scarce, Est. $100-$120, Scott #LJ40-43
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