1920s rare 9ct gold tonneau vintage Rolex watch

A rare 9ct gold tonneau vintage Rolex watch. The case measures 24.5 x 35.5 mm (including lugs) and is numbered 578, 30670 to the back. The case is signed Rolex, 7 World’s Records, RWCLtd. (Rolex Watch Company Limited) and hallmarked Glasgow 1926. The Prima movement is signed Rolex, Timed to six positions, For all climates, with 15 jewels. The silvered guilloche (engine-turned) dial has black Arabic numerals with a subsidiary seconds dial. The dial is signed Rolex above the centre.