Bidspirit auction | Liechtenstein - Air Post stamps

Liechtenstein - Air Post stamps - 1931, Zeppelin over Naafkopf, 1fr olive black, 2fr blue black, complete set of two, unfolded sheet margin blocks of four, perfect quality, full OG, NH, VF, C.v. $2,260++, SBK #F7-7, CHF3,200 as singles, Est. $750-$900, Sc. #C7-8