Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 3
Lot 1150:
1917, 1r brown, light brown and orange, imperforated block of six plus two labels (4×2) with vertical varnish lines, five stamps and one label with full or partial double impression of the background, full OG, NH, VF, C.v. $1,000++, Est. $250-$300, Sc. # 131d
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