Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2
Lot 728:
1990, Flag, 1c x2, 5c and 40c, imperforated se-tenant booklet pane of four, imprint at the top margin, full OG, NH, VF, C.v. $1,000, Unitrade C.v. CAD$2,000, Est. $500-$600 , Sc. #1190b
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