Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1433:
1964-70, Gas-Oil Separating Plant, 1p-200p, complete set of 28, excellent quality unit, full OG, NH, VF and scarce in complete set, C.v. $1,922, Est. $800-$1,000 , Sc. #314-41
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