Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 2

Liechtenstein - Air Post stamps

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Start price: $400

Buyer's premium:

1930, Airplane over Mountains and Vaduz Castle, 15rp-1fr, complete set of six, unfolded blocks of four, post office fresh quality, full OG, NH, VF, C.v. $2,072++, SBK #F1-6, C.v. CHF3,000 as singles, Est. $700-$800 , Sc. #C1-6