1920s rose gold octagonal vintage Rolex Oyster watch

An extremely early 9ct rose gold octagonal vintage Rolex Oyster watch. The case, with a knurled front bezel, measures 32 x 34 mm (excluding lugs). The case is signed RWC Ltd (Rolex Watch Company Limited), hallmarked Glasgow 1926. The Rolex Extra Prima movement is signed, with 15 jewels, timed to 6 positions, for all climates. The crown having an ‘Oyster Patent’. The dial has black Arabic numerals with a subsidiary seconds dial and fine blued steel Breguet style hands. The dial is signed Rolex Oyster above the seconds dial.