A rare 18ct. white gold pocket watch with diamond set numerals, Prince Imperial type, Ref:1586, circa 1940, silvered dial signed Rolex Serpico Y Laino, Officially Certified Chronometer, diamond dot markers and baguette diamond quarters, subsidiary seconds with raised baton markers, large 17-jewel Ultra Prima movement timed to six positions, shaped case with snap on back numbered 1586/8753/947742, dial, movement and case signed, fine chain through corner of case terminating in a sprung clip, 41mm x 37mm.