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Braille watch is used by touching the dial and noticing the embossments. Both analog and digital versions are available. The analog versions have a protective glass or crystal cover that is flipped open when time needs to be read and the clock-hands are constructed to not be susceptible to movement at the mere touch of the finger that a blind person uses to observe their positions.
The use of radium to provide luminescence for hands and indices on watches soon followed. The Ingersoll Watch division of the Waterbury Clock Company , a nationally-known maker of low-cost pocket and wristwatches, was a leading popularizer of the use of radium for watch hands and indices through the introduction of their "Radiolite" watches in ...
In older clocks the setting was done by opening the face and manually pushing the minute hand which rotated the cannon pinion directly. A minute wheel whose pinion drives the hour wheel. During setting it is driven by the intermediate wheel in the keyless works and it turns both the cannon pinion and the hour wheel, moving the hands.
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Ingersoll was a popularizer of the use of radium on hands and indices with their "Radiolite" series, seen in this 1917 ad. In 1896 Ingersoll introduced a watch called the Yankee, setting its price at $1. This made it the cheapest watch available at the time, and the first watch to be priced at one dollar; the "dollar watch" was born.
In watches sold for timekeeping, analog display remains very popular, as many people find it easier to read than digital display; but in timekeeping watches the emphasis is on clarity and accurate reading of the time under all conditions (clearly marked digits, easily visible hands, large watch faces, etc.).
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