Grand Seiko caliber 9R66
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| Brand: | Grand Seiko |
|---|---|
| Reference: | 9R66 |
| Base: | Grand Seiko 9R65 |
| Movement: | Spring Drive |
| Display: | Analog |
| Jewels: | 30 |
| Reserve: | 72 |
| Date: | Date |
| Hands: | Hours, Minutes, Seconds, Additional 24 Hour Hand (adjustable) |
| Additionals: | Power Reserve Indicator |
9R66 description
Caliber 9R66 is a self-winding movement with GMT function, based on Seiko's Spring Drive technology. It was introduced in 2006.
Spring Drive, one of the great innovations in modern watch making history, regulates a spring-driven movement with state-of-the-art electronic technology that functions without batteries or other external power source. Its sole power source is a mainspring, which drives a series of gears. A rotor, connected to the end of these gears, generates a small electrical charge that activates an electronic circuit and quartz oscillator. Its accuracy is unprecedented for a watch wound by a mainspring. The development of the 9R Spring Drive movement was possible only because Grand Seiko is one of the few manufacturers with expertise in both mechanical and electronic watches.
All watches using the Grand Seiko 9R66 movement:
