1925 (Jan 22) Laurentide Air Service, First Flight Larder Lake - Rouyn Lake, cover with Laurentide Semi-Official green Airmail on reverse canceled Larder Lake and Rouyn Lake; franked with 3 cent postage carmine and 1 cent yellow imperf on the front tied by Larder Lake cds.; cover is legal size with bottom flaw, otherwise fine.
