Canada, 1919-27 Airmail Semi-Official & Private Commercial Airline issues. 13 including CL5 tete-beche pair, CL6(2), CL7-9, CL10(2), CL12-13, CL42; also Air Post Semi-Officials CLP3 and CLP5, o.g. except for a couple no gum, and CL6(1) with a thin, mostly very fine with a couple lesser, most interesting lot. Unitrade No. CLP3//CL42 C$1,805 ($1,836). $0 (Image)