An early 20th century silver and enamel spherical watch by Rolex

An early 20th century silver and enamel spherical watch by Rolex, applied with mauve guilloche enamel and fine gold decoration. The circular white dial with black Arabic numerals. The movement signed Rolex. The inside case signed Rolex, with serial number 1091795 with maker's mark W&D and import mark for London 1919. Manual winding. 2.4cm diameter.