The Hourstriker utilizes a mechanism with "Sonnerie en passant" that enables the wearer to set his watch in such a way that each hour, as well as the half hour, is struck in passing, with no need to activate any buttons or slide levers. Watch may also be silent, and it is easy to switch between the settings. Dial color: black. Glass: sapphire. Winding automatic; water resistant 30m; power reserve: 40h.