The system is primarily designed for sight-impaired customers, who can use the watch’s two ball bearings to discover out the time, however it is also suitable for basic use. The watch features raised marks at each hour and two moving, magnetically attached ball bearings. One ball bearing, on the edge of the watch, indicates the hour, whereas the opposite, on the face, indicates the minute. Traditionally, watches have displayed the time in analog type, with a numbered dial upon which are mounted at least a rotating hour hand and a longer, rotating minute hand. Many watches also incorporate a 3rd hand that exhibits the current second of the present minute.

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