Germany, Semi-Official Airmail, 1912, 1m on 10pf "Gelber Hund". O.g., unusually well centered, fresh and Very Fine. Michel No. IV. Sc  Michel €600 ($822). $0 (Image)

Germany, Semi-Official Airmail, 1912, 1m on 10pf "Gelber Hund". Darmstadt airpost cancel, F.-V.F. Michel No. IV. Sc  Michel €200 ($274). $0 (Image)

Germany, Semi-Official Airmail, 1912, 1m on 10pf "Gelber Hund". Single on front and pair on reverse of special flight card, in combination with 5pf green, all tied by "12.6.12 Rhein au Main" flight postmarks; stamp with discoloration from card color, Fine, still a scarce multiple 1m Gelber Hund franking. Michel No. IV  Estimate $100 - 150. $0 (Image)