Hello, janbee. This will probably be my last message on this subject. I have nothing positive to report, but I'll give you an outline of what I have found. I have gone down several blind alleys, and banged my head against innumerable brick walls. Anyway, the first thing is: I'm certain that the medallion was made by Goldsmiths & Silversmiths Company. Letters below Capt. Broke's portrait are G. & S. Co. Ld, not C. & S. Co.Ld, as I 1st thought. G. & S. Co. (founded 1880, premises at 112 Regent St. London), merged 1952 with Garrard & Co. They made medals, as well as gold & silver items. Records of Garrards (&, presumably, G. & S.) are at Victoria & Albert Museum, Hammersmith. Second, and last, thing is: I have spoken with a noted writer of naval books because I was told that he might be able to help re the medallion, but he couldn't help. He has written a book about Broke & Shannon, but knew nothing about your medallion. I could find nothing useful online. Some digging in record offices etc. is required. I posted a message on Yahoo!Answers, and received a lot of help from one correspondent, but none of it led anywhere. It's time to call it a day, I think. I'll probably see you in the Crosswords section of AB. All the best. Over and out.