Grand Seiko SBGN013
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Caliber 9F86 is based upon, and has all the precision and durability attributes of, the original 9F but incorporates a GMT function that allows the watchâ€™s precision to be maintained when the hour hand is adjusted independently. This is made possible by new components that have been created especially for this movement.
The watch allows you to move the hands without stopping the watch when setting it to local time. This achieves a convenience in which excellent accuracy of the quartz watch wonâ€™t be lost.