Canada 1897 Encore Whisky Alcohol Diamond Jubilee Advertising Cover

Cover franked with 3c Diamond Jubilee, tied by Montreal flag cancel (23 Sep), to Halifax, with c.d.s. arrival backstamp, full-back illustrated advertisement for "The Encore Whisky", and agents Meagher Bros & Co of Montreal, depicting a man in traditional Scottish attire with a dram, a superb and scarce cover.