Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1022:
1923, Philately for the Labor, silver surcharge 4r+4r on 5000r violet, nice and fresh single, full OG, VLH, VF, expertized by H. Bloch, C.v. $1,000, Est. $600-$700, Scott #B42
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