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

Great Britain

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Start price: $75

Buyer's premium:

1924, King George V, 1½p red brown, inverted watermark Block Cypher, booklet pane of four stamps and two printed labels at left, full OG, NH, VF, SG #420 dw, C.v. £300, Est. $150-$200, Scott #189d