Tudor Black Bay Fifty-Eight Men's Watch M79030B-0002. This 39mm watch features a stainless steel case and a unidirectional rotating bezel with a blue anodised aluminum disc. It is fitted with a "soft touch" blue leather strap. The blue dial has luminescent dot and index hour markers. The watch is powered by the Tudor Caliber MT5402 self-winding automatic COSC Chronometer certified movement with a 70-hour power reserve.