SEIKO has devoted ● Spring Drive Spring Drive, the unique mechanism made available only by SEIKO technology, ensures quartz accuracy while using the unwinding power its efforts to watch manufacturing and inspections. In order of the mainspring as its sole power source.
CAUTION rotation must not be too loose or too tight.) ⇒ ■ “ROTATING BEZEL” page 62 If there are any malfunctions, contact the retailer from whom the watch was purchased or SEIKO CUSTIMER SERVICE CENTER. ● While diving ● After diving Please observe the following cautions for use.
■ ROTATING BEZEL ● How to use the rotating bezel By setting the rotating bezel beforehand, the elapsed time since the start of an event such as diving can be measured. 1. At the start of the event, for which you want to measure the elapsed time (for example, when you start diving)...
・ Your Grand Seiko watch was strictly checked and completely adjusted at the factory ・ SEIKO makes it policy to usually keep a stock of spare parts for GRAND to ensure its high accuracy. However, if your watch gets out of order with the cor- SEIKO watches for 10 years.
SEIKO. and adjusted by disassembly and cleaning (overhaul) regularly once every 3 to 4 years. ・ We recommend that you have your watch checked by SEIKO every 3 to 4 years for long-time use of your watch.