GRAND SEIKO SBGE005G

Rp 63,800,000

Specifications

REF. SBGE005
Driving system Spring Drive
Caliber No. 9R66
Case Stainless steel Case back: Stainless steel and sapphire crystal
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Crasp Three-fold clasp with push button release
Accuracy ±1 per day (±15 seconds per month)
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 157.0 g
Case size Diameter 41.0mm  Thickness 13.8mm
Remarks ・Screw down crown
・Screw back
・See-through back
・Jewels: 30
・Dual time function with 24-hour display
・Power reserve display function
・Quick correction function of time difference adjusting to a calender
・Power reserve: Over 72 hoursIn an actual product, the case back direction might be different from the photograph.
Category:

Description

Spring Drive is Seiko’s exclusive movement that achieves an unprecedented level of accuracy (+/- 15 seconds per month on average, equivalent to +/- 1 second per day) by regulating a spring-driven watch with state-of-the-art electronic technology that functions without batteries or other external power source.

As in conventional mechanical watches, the sole power source of Spring Drive is a mainspring that can be wound by the motion of an oscillating weight or by winding the crown. And just as in mechanical watches, the mainspring drives a series of gears that rotate the hour, minute and second hands. A rotor, connected to the end of these gears, generate a small electrical charge that activates an electronic circuit and quartz oscillator.

The Tri-synchro regulator is a unique speed controller for Spring Drive that replaces the escapement, which is a mechanical speed control device used in almost all conventional mechanical watches. The Tri-synchro regulator moves the second hand in a smooth motion, without ticking and with extreme accuracy.

Some 80% of the components in a Spring Drive caliber are the same as those in a luxury mechanical watch. Spring Drive is a movement powered by a spring, just like a mechanical watch, with a different kind of regulator and combines the long-lasting autonomy of a mechanical watch with the precision that, until now, only electronic watches could provide.

To ensure reliable and accurate operation, all these parts need to be manufactured to the highest standards of precision, and assembling them requires superior craftsmanship.

The development of the Spring Drive movement caliber 9R was made possible because Seiko is one of the very few manufactures with expertise in both mechanical and quartz watches.

Since the first Grand Seiko Spring Drive in 2004, new movements have been created with even more complex mechanisms–including the GMT in 2005 and chronograph with GMT in 2007. Showing that with the Spring Drive caliber 9R, time never loses momentum.