Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2
Lot 1750:
1909, President Barclay, Ships, Plants, Views, 1c-75c, imperforate plate proofs in black on India paper, complete set of ten in blocks of four, except 50c and 75c are in two pairs, most with sheet margins, tiny thin on one stamp of 5c, no gum as produced, VF and scarce set in multiples, Est. $500-$600, Scott #115-24
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