18ct Gold duplex watch by Thomas Fredrick Cooper 6, Calthorpe Street, Grays Inn Road London. He is know as a maker of Repute and as a supplier to the American market, he was working between 1820-40. The London mark is illegible on the case but the loop is marked P for 1830. Numbered 2366.Watch diameter 42mms, dial 39mms. Working order.