A long-cherished and simple Spring Drive watch

A Spring Drive standard model that has had a strong following ever since its release. It was the first Grand Seiko watch to be powered by a Spring Drive, the third movement mechanism, combining the motive force of a mainspring found in mechanical watches with the high precision of a quartz watch. A Spring Drive watch that has had a strong following ever since its release. It was the first Grand Seiko watch to be powered by Spring Drive, Grand Seiko’s unique caliber, which combines the motive force of a mainspring with the high precision of a quartz watch.

In Spring Drive, the second hand moves in perfect glide motion, reflecting the natural and continuous flow of time itself, a unique mechanism that differs from mechanical and quartz movement.

It has a 72-hour power reserve, and a power reserve indicator on the bottom left of the dial. The watch face and multi-faceted hands and hour markers, depending on the angle and amount of light, gives it an eternal appeal.

Exterior

Case Material : Stainless steel

Glass Material : Dual-curved sapphire crystal

Glass Coating : Anti-reflective coating on inner surface

Case size : Diameter 41mm × Thickness 12.5mm

The perimeter of Band : 195mm

Clasp type : Three-fold clasp with push button release

Functions

Water resistance : 10 bar

Magnetic resistance : Equipped

Weight : 150.0 g

Other details / Features :

30 jewels
Case back with lion emblem
Date display
Power reserve display
Screw case back
Screw-down crown
Stop seconds hand function
See-through case back

Movement

Caliber no. : 9R65 Instructions

Movement Type : Spring Drive

Power reserve : Approx. 72 hours(3 days)

Accuracy : ±1 second per day / ±15 seconds per month (average)

SBGA203G - 72-Hour Power Reserve Spring Drive