Bidspirit auction | Iceland - Air Post stamps

Iceland - Air Post stamps - 1931, black ''Zeppelin 1931'' overprint on King Christian X stamps of 30a, 1k and 2k, complete set of three in blocks of four, 2k has expert's sign, but with tiny offset on reverse of one stamp, full OG, NH, VF, C.v. $856++, Est. $250-$300, Sc. #C9-11