A Spring Drive watch with a dial depicting the beautiful Atera Valley in all its emerald green glory

In Nagano Prefecture, where Spring Drive watches are manufactured, there are several mountains that rise to over 3,000 meters in altitude. The countless rivers that flow from these mountains have created a lush, natural environment over many years. The Atera River carves a deep ravine called the Atera Valley, which is renowned for its breathtaking beauty. Using the clear, emerald-green waters of the Atera River as its motif, the dial evokes the image of a stream so clear that one can see the bottom, as well as the rich, natural harmony of summer. At the heart of this timepiece is the Caliber 9RA2 Spring Drive 5 Days. This movement provides up to 120 hours (5 days) of power when fully wound, as well as an average accuracy of ±10 seconds per month, an astonishing feat for a watch powered by a mainspring.

Exterior

Case Material : High-intensity titanium

Bottom of the box : Transparent and screw-on case bottom

Glass Material : Double-curvature sapphire

Glass Coating : Anti-reflective treatment on the inside

Case size : Diameter 40.0mm Lug to lug 47.9mm Thickness 11.8mm

The perimeter of Band : 195mm

Band width : 22mm

Closure type : Triple folding clasp with safety button

Functions

Water resistance : 10 bar

Magnetic resistance : 4,800 A/m

Weight : 112 g

Other details / Features :

Screw crown
Hypoallergenic (against metal allergy)
Power reserve indicator

Movement

Caliber no. : 9RA2 Instructions

Movement Type : Spring Drive

Accuracy : ±10 seconds per month (±0.5 second per day)

SLGA025G - High Intensity Titanium 9RA2 Spring Drive 5 Days