Canada 1881 Violet Oshawa MOO Violet CDS Small Queen Advertising Cover

Cover franked with 3c Small Queen, tied by violet OSHAWA MOO OC 20 81 ONT c.d.s., on W.T. Dingle Honey’s Improved Fanning Mill illustrated advertising cover, to Armadale, with Unionville OC 21 split-ring backstamp, slightly reduced at right, fine.