TUDOR Black Bay Bronze M79250BA-0001 The Black Bay family is growing with the arrival of the new Black Bay Bronze, a 43 mm diving watch that references the brand's history and is equipped with TUDOR's manufacture calibre MT5601. 43 mm bronze case with bronze-coloured PVD-treated steel caseback and satin finish. Manufacture Caliber MT5601 (COSC), automatic mechanical movement with bidirectional rotor system. Twisted bronze crown adorned with an engraved TUDOR rose. Unidirectional rotating bronze bezel with matte slate grey anodized aluminum disc with 60-minute graduation. Slate grey dial, domed sapphire crystal. Polished black non-buck leather strap with bronze buckle closure. Water resistant to 200m (660ft). Power reserve of approximately 70 hours.