Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Russia And Soviet Union - 1934, Civil Aviation, imperforate photo proofs of 5k-80k, complete set of five, much clear design then for issued stamps, plus numerous differences in printing details, such as clearly visible horizontal stairs on the fuselage, lacks of white outline of the aircraft tail, unclear details of right engine, 50k with town name ''Korcheva'' instead of ''Volga'' on issued stamp and etc., no gum as produced, hinged, VF and rare, common set is not included in the lot, Est. $1,000-$1,200, Scott #C40-44