1920s 9ct gold rectangular vintage Rolex watch

A 9ct gold rectangular vintage Rolex watch. The case measures 24 x 38mm (including lugs) and has model number 556 to the back. The case is signed Rolex, 20 World’s Records, Geneva-Suisse, RWCLtd. (Rolex Watch Company Limited), and hallmarked Glasgow 1928. The movement is signed Rolex Prima, with 15 jewels, For all climates, Timed to 6 positions. The silvered ‘guilloche’ (engine-turned) dial has black Arabic numerals, with a subsidiary seconds dial. The dial is signed Rolex above the centre.