Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1148:
1983, Base Ship, two sunken die proofs of 20k in dark blue with and without hatching of ”20”, both are in gray black, first one with printer’s angles, approximate size 95 -100x120mm, full OG with hinge traces, VF and rare, Est. $800-$1,000 , Sc. #5161
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