cover Flight Covers, 1925-46, 17 flight covers incl. first flights and commercial air post covers, better items incl. six 'Cherry Red' air post semi-official flight covers (Unitrade CL46, two with airline's printed corner card) and 25c Red 'Laurentide' air post semi-official stamp (Unitrade CL3) tied by 1925 Trans-Canada flight cachet on back of cover to Montreal (flight did not take place and Canadian franking removed from front), some have faults, otherwise fine-very fine lot est.