Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Canada - 1918 (September 4), First Flight cover Ottawa - Toronto, franked by King George V Admiral stamp of 3c brown, Aero Club of Canada (25c) black and red on reverse, turquoise scroll cachet ''By Aeroplane. SEP.4.1918...'' on front, Toronto ''SP.4.18'' receiver on the back, minor facial soiling, otherwise VF and rare, C.v. $3,150, Unitrade C.v. CAD$4,500, Est. $2,000-$2,500, Scott #CLP1