Maestro Men’s Automatic Calibre RW4200 Black Dial Watch. Case size 40mm. Stainless steel, black dial, silver indexes. This maestro features a sleek stainless steel bracelet, a 40mm case and a sophisticated black dial with silver hands punctuated by silver indexes to enhance the traditional look of this watch. The RW4200 mechanical with automatic winding in-house movement features a 38-hour power reserve.