Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 828:
EXHIBITION STYLE COLLECTION: 1920, 58 mainly mint stamps (2 – used), singles and blocks, 24 imperforate and perforated proofs, including four on Chain-Breaker 40h red brown, Hradcany 5h imperf strip of four with surcharges only on two left stamps, paper varieties, double-triple surcharges and more, great unit, full/part of OG, VF, Est. $500-$600, Scott #B130-32, var
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