Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1

Great Britain

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Start price: $150

Buyer's premium:

1912, King George V, 1½p red brown, Simple Royal Cypher watermark, right sheet margin block of four, upper right stamp with ”PENCF” variety (position R15/12), full OG, NH, VF, SG #362, a, £430++, Est. $250-$300, Sc. # 161, a