Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 635:
1919, King George V, 1½p bister brown, horizontal pair with perforation 14, imperforate between stamps, full OG, NH, F/VF and rare, C.v. $900, SG #198a, £850, both values for hinged pairs,Scott #121a
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