Bidspirit auction | Worldwide Air Post Stamps and
Worldwide Air Post Stamps and Postal History - Germany - 1938, Count von Zeppelin, 25pf pale blue and 50pf green, complete set in bottom sheet margin blocks of eight (4x2), full OG, NH, VF, C.v. $340, Mi #669-70, C.v. €440++, Est. $150-$200 , Scott #C59-60