Rolex - A 9ct gold gentleman's wristwatch

circa 1923, the unsigned circular two tone cream coloured dial, 22mm diameter, with black Arabic numerals, black fretwork hands, subsidiary seconds register and chemin de fer chapter ring, the fifteen jewel signed 'Extra Prima' mechanical crown wind movement, the cushion shaped case, 28mm, with London import marks for 9ct gold, case number 358, with fixed lugs to an aftermarket leather strap with pin buckle