1920s rare early 18 carat gold cushion vintage Rolex Oyster watch

A rare early 18 carat gold cushion vintage Rolex Oyster watch. The case measures 32 x 32 mm, with a knurled bezel. The case is signed R.W.C. Ltd (Rolex Watch Company Limited), Rolex 20 World’s Records, hallmarked Glasgow 1928 and numbered 23987. The movement is signed Rolex, Swiss Made, with 15 Rubies, the crown having the Oyster Patent. The dial has raised Arabic numerals at the quarters with a subsidiary seconds dial. The dial is signed Rolex Oyster above the centre.