A Spring Drive classic inspired by the legend of the Omiwatari.
Features
Most winters, the water of Lake Suwa freezes over and, most years, a long ridge appears in the ice from one side of the lake to the other. Tradition has it that this is the Omiwatari, or where the gods walk out over the ice.
True or not, the legend has inspired the craftspeople of the nearby Shinshu Watch Studio to create a dial of exquisite subtlety for this hand-winding Spring Drive timepiece. It has the color, feel, and texture of ruptured ice on the surface of Lake Suwa.
The movement powering this watch is the Spring Drive Caliber 9R31, which uses the Dual Spring Barrel to deliver a power reserve of 72 hours when fully wound. Its exquisite finishing is visible through the exhibition case-back, along with the power reserve indicator.
Specifications
| Exterior: | Stainless steel, Caseback: Stainless steel and sapphire crystal |
|---|---|
| Case back: | See-through & Screw case back |
| Glass Material: | Dual-curved sapphire crystal |
| Glass Coating: | Anti-reflective coating on inner surface |
| Case size: | Diameter 38.5mm Lug-to-lug 43.7mm Thickness 10.2mm |
| Band width: | 19mm |
| Band Material: | Crocodile leather |
| Clasp type: | Three-fold clasp with push button release |
| Caliber no.: | 9R31 Instructions |
|---|---|
| Movement Type: | Spring Drive Manual winding |
| Power reserve: | Approx. 72 hours(3 days) |
| Accuracy: | ±15 seconds per month (±1 second per day) |
| Water resistance: | Splash Resistant |
|---|---|
| Magnetic resistance: | 4,800 A/m |
| Weight: | 68 g |
| Other details / Features: |
|
A dial capturing a natural phenomenon observed on Lake Suwa during the frigid cold of winter
This design draws inspiration from the “Omiwatari,” a mysterious winter phenomenon that occurs when Lake Suwa, located near the Shinshu Watch Studio, the home of the Spring Drive watches, freezes completely. The dial evokes the raised ridges that form on the frozen lake’s surface, while the tempered blue seconds hand glides smoothly across it.A dress design with a refined elegance and striking definition
The watch’s form was created specifically to house a slim movement. Flexibility and tension combine, allowing light to play across a subtle ridgeline. Thanks to Zaratsu polishing, its elegant surface is reminiscent of a polished jewel. The sapphire glass features a unique domed shape that effectively uses the refractive properties of light, adding a refined nuance to the dial. While following the Grand Seiko Style, the case features a distinguished case design with a curved form. This creates a dignified atmosphere that suits a refined style of dress beautifully.Caliber 9R31
A manual-winding Spring Drive movement made in the Shinshu Watch Studio, Caliber 9R31 uses the innovative Dual Spring Barrel, which contains two mainsprings set in parallel to deliver a power reserve of 72 hours.Option strap

Strap
RG03W19BL
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Blue (Oil matte) |
| Material: | Crocodile |
Strap
RG03W19GN
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Green (Oil matte) |
| Material: | Crocodile |
Strap
RG03W19RD
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Reddish brown (Oil matte) |
| Material: | Crocodile |
Strap
RG03W19WT
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | White (Pearl) |
| Material: | Crocodile |
Strap
XGL00119
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Black |
| Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL00319
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Brown |
| Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL00519
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Navy |
| Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL00719
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Light blue |
| Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL00919
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Elegant light green |
| Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL01119
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Warm orange |
| Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons
Strap
XGL01319
| Band width: | 19mm |
|---|---|
| Clasp width: | 16mm |
| Color: | Light gray |
| Material: | Crocodile |
- Available at the Grand Seiko Boutiques and selected Grand Seiko Salons










