ANTIGUA. Sg.15 (4). 1875. ENGLISH HARBOUR to GLASGOW. Entire franked with horizontal strip of four 6d. blue green perf. 12 1/2, cancelled with A18 killer, backstamped English Harbor and Glasgow arrival cds. A RARE and very fine double rate cover. Ex Col. Bassemer and Frederick Mayer. Cert. B.P.A. (Image1)