Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 520:
1901, Universal Penny Postage and King Edward VII, two imperforate plate proofs of typo printing for 1p and ½p in black, blocks of four printed on thin card or thickened glossy paper, no gum as produced, NH, VF, Scott #129-30
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