Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 447:
Description
1991, definitive issue, kestrel, imperforated proof of 1c multicolored, left sheet margin horizontal gutter block of four, full OG, NH, VF, C.v. $400 as two pairs, Est. $200-$240 , Sc. #2476 P
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