Electronic watch powered by battery and regulated by quartz crystal. 1 jewel. Caliber Japic corp. W471.
Around the dial there is ring within which there is a cover glass. On the ring there are marks to 60 minutes and with it the time required for a task is set.
This type of clock is intended for divers since it has a threaded crown which ensures water resistance. The needs of divers are also met by a mobile ring which tracks the passage of time, eg. decompression.
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