Automatic movement Tudor Calibre T201, 25 Jewels, ETA 2671 base. Analog dial with diamond hour markers and black background. Silver-tone hands with luminescent coating. Minute markers on the outer rim. Date display at 3 o'clock position. Fixed silver-tone bezel. Scratch resistant sapphire crystal. Screw down crown. Solid case back. Round stainless steel case in silver tone. Black leather strap. Fold over clasp with safety release. Water resistant to 100 meters / 330 feet depth (Approx). Power reserve: approx. 38 hours. Vibration frequency: 28800 vph. Item Variations include M53000-0045 model number.