Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 1
Lot 290:
1981, Flag over Supreme Court, 20c black, dark blue and red, imperforated block of 20 (2×10), double paper variety on six stamps at bottom, red splice papers on front and reverse, full OG, NH, VF and very rare, Est. $500-$600, Sc. # 1894a, var
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