Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 1
Lot 470:
1992, Hummingbirds, 29c, eight imperforated stage proof strips of five in yellow, magenta, blue, brown (birds), brown (USA and 29c), green and orange frames and complete design, some usual miscuts, still full OG, NH, VF and rare, C.v. $3,600, Est. $1,500-$2,000, Sc. #2646a Pb‑i
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