Tudor Heritage Black Bay Pro 79470 Automatic 39 Mm Steel Bracelet New Full Set 02 - 2023. Tudor M79470-0001 Black Bay Pro Manufacture Calibre MT5652 (COSC) Steel case, 39 mm Riveted steel bracelet Five-year guarantee, transferable, without registration or mandatory servicing Steel case, 39 mm, polished and satin-finished Lugs: 20 mm wide Case thickness: 14.6 mm Movement Manufacture Calibre MT5652 (COSC) Automatic mechanical movement with bidirectional rotor Integrated architecture Autonomy of approximately 70 hours Screw-locked steel winding crown with TUDOR rose in relief Water-resistant to 200 m Fixed 24-hour graduated bezel in satin-finished steel Dial Black, domed Domed sapphire crystal Riveted steel bracelet, polished and satin-finished, TUDOR clasp “T-fit” with quick adjustment system