Watch List notes:

British Commemorative Medals, Arthur, Duke of Connaught, marriage to Princess Louise Margaret of Prussia, silver medal, 1879, by J. S. and A. B. Wyon, conjoined busts of the couple to l., rev. crowned armorial shields with ribbons and crests, within decorative border, 64mm. (BHM.3052; Eimer 1662), in Wyon fitted case of issue, extremely fine with light tone
Arthur, Duke of Connaught (1850-1942) was the third son of Queen Victoria and Prince Albert. Louise Alexandra Margaret (1860-1917) was the daughter of Prince Frederick Charles Nicholas of Prussia.
Estimate: 300-350 GBP