1920s early silver rectangular vintage Rolex watch

An early silver rectangular vintage Rolex watch. The case measures 25 x 40 mm (including lugs). The case has fine hinged lugs and is hallmarked 1926. The case is signed RWC Ltd (Rolex Watch Company Limited). The Rolex Prima movement has 15 jewels, is timed to 6 positions, for all climates. The silvered dial has black Arabic numerals with a subsidiary seconds dial. The dial is signed Rolex above the centre.