Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 886:
1925, Academy of Sciences, 3k orange brown and 15k dark olive green, complete set of two, perforation 13¼, housed on page from a Collection, full/large part of OG, VF, Est. $250-$300, Scott #326-27 var
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