Deck watch in a hallmarked silver open-face case, with plastic glass. It has a three-quarter plate movement, signed and numbered, with an English lever escapement and compensation balance. The watch has a cream enamel dial with Roman numerals, a subsidiary seconds dial, and blued steel spade and poker hands.

The case is numbered 103287. The signed and numbered dial has the Admiralty broad arrow and an attached paper tag is marked 'H.S.3' designating Hydrographic Supply category 3. It has keyless winding and setting with a push-piece.