ROLEX Oyster reference 1573 early wristwatch in steel, Switzerland around 1939, manual winding, tonneau-shaped oyster case, screwed down case back & original winding crown, smooth bezel, silvered duoton-dial with nice patina, luminous indices & -hands, constant second at 6, silvered 'Rolex Ultra Prima'- movement, 15 jewels, compensation-balance with Breguet-hairspring, 6 adjustments, measures approx. 38,5 x 29,5 mm, needs to be overhauled, condition 2-3