Rolex Oyster 6423 watch. Manual winding. Steel case. Graceful signs of age. Clean dial and hands. Winds, sets, and runs very well. Comes on a newly fitted aftermarket strap and buckle. High quality Rolex caliber 1210 17 jewel manual winding movement with Breguet overcoil hairspring. 34mm steel Oyster case with steel engine turned bezel. Screw down crown which operates as intended, screwing down smoothly and securely.