Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1415:
SELECTION OF ERRORS: 1918-20, 11 mint stamps in singles, pairs and block of four, including ten inverted surcharges, one double and three surcharge shifts, No.36b has gum creases, others are in sound condition, full OG, NH, VF, C.v. $545++, Est. $250-$300, Sc. #20a/36d
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