A Spring Drive U.F.A. limited edition captures the ethereal beauty of a frost-covered dawn with its violet-colored dial
SLGB005
Evolution 9 Collection
Nov. 2025 Release
Features
Powered by the Caliber 9RB2, the groundbreaking movement receives the U.F.A. designation which stands for “Ultra Fine Accuracy,” this creation boasts an astounding annual rate of ±20 seconds, making it the most accurate wristwatch movement powered by a mainspring today.*
* As of September 2025, based on Grand Seiko’s research
Specifications
| Exterior: | Ever brilliant steel, Caseback: Ever brilliant steel and sapphire crystal |
|---|---|
| Case back: | See-through & Screw case back |
| Glass Material: | Box shaped sapphire crystal |
| Glass Coating: | Anti-reflective coating on inner surface |
| Case size: | Diameter 37.0mm Lug-to-lug 44.3mm Thickness 11.4mm |
| Band width: | 20mm |
| Clasp type: | Three-fold clasp with push button release |
| The perimeter of Band: | 193mm |
| Caliber no.: | 9RB2 Instructions |
|---|---|
| Movement Type: | Spring Drive |
| Power reserve: | Approx. 72 hours(3 days) |
| Accuracy: | ±20 seconds per year (±3 seconds per month) |
| Water resistance: | 10 bar |
|---|---|
| Magnetic resistance: | 4,800 A/m |
| Weight: | 151 g |
| Other details / Features: |
|
An astonishing annual rate
The movement achieves its ±20-seconds-per-year accuracy thanks to enhanced manufacturing and processing methods for the three-month-aged quartz oscillator, and a newly designed IC. And, as with the 9RA series of Spring Drive movements, the frequency of each individual quartz oscillator is measured at several different temperatures, with the resulting data necessary for thermo-compensation programmed into the low-power IC. Both the oscillator and sensor are vacuum-sealed to minimize temperature differences and protect against external factors such as humidity, static electricity, and light, ensuring precise temperature adjustments and the stable performance of the quartz oscillator. In addition, for the first time in Spring Drive, the new movement features a regulation switch that can be used during after-sales service to correct any divergences in accuracy that may occur over long periods of use.
The ephemeral beauty of ice forests at dawn.
To the east of the Shinshu Watch Studio lie the Kirigamine Highlands, where frost-covered trees can be observed during harsh winter months. As dawn breaks over the forests, frost catches the first light of the day, awakening in an ethereal violet glow. The intricately textured dial captures the delicate, crystalline beauty of the ice forests thanks to refined finishing techniques. The deep violet hue gradually lightens toward the center and reveals the texture underneath, evoking the forests slowly emerging in the morning light. The dial offers a refined backdrop for the seamless glide motion of the silver-toned Spring Drive seconds hand, echoing the quiet, gradual unfolding of time itself.
Movement finishing reflecting the natural beauty of Shinshu
Visible through the sapphire crystal case back, the movement's finish is inspired by the frost that winter brings to the trees of Shinshu. The jewels echo the glittering stars that sparkle during the early days of winter above the surrounding mountains.
The Spring Drive U.F.A. caliber with an astounding annual rate
The pursuit of high accuracy has always been the cornerstone of Grand Seiko’s values. Receiving the new U.F.A. designation, which stands for “Ultra Fine Accuracy,” Caliber 9RB2 boasts a level of precision defined not by accuracy in seconds per day, week, or month, but by accuracy over one year. The movement has an astounding annual rate of ±20 seconds, or approximately ±3 seconds per month.Option strap
Strap
XGL00120
INR 25,000.00
| Band width: | 20mm |
|---|---|
| Clasp width: | 18mm |
| Color: | Black |
| Material: | Crocodile |
- Available on our Online E-Store grandseikoboutique.in
Strap
XGL00320
INR 25,000.00
| Band width: | 20mm |
|---|---|
| Clasp width: | 18mm |
| Color: | Brown |
| Material: | Crocodile |
- Available on our Online E-Store grandseikoboutique.in
Strap
XGL00520
INR 25,000.00
| Band width: | 20mm |
|---|---|
| Clasp width: | 18mm |
| Color: | Navy |
| Material: | Crocodile |
- Available on our Online E-Store grandseikoboutique.in
Strap
XGL00720
INR 25,000.00
| Band width: | 20mm |
|---|---|
| Clasp width: | 18mm |
| Color: | Light blue |
| Material: | Crocodile |
- Available on our Online E-Store grandseikoboutique.in
Strap
XGL00920
INR 25,000.00
| Band width: | 20mm |
|---|---|
| Clasp width: | 18mm |
| Color: | Elegant light green |
| Material: | Crocodile |
- Available on our Online E-Store grandseikoboutique.in
Strap
XGL01120
INR 25,000.00
| Band width: | 20mm |
|---|---|
| Clasp width: | 18mm |
| Color: | Warm orange |
| Material: | Crocodile |
- Available on our Online E-Store grandseikoboutique.in
Strap
XGL01320
INR 25,000.00
| Band width: | 20mm |
|---|---|
| Clasp width: | 18mm |
| Color: | Light gray |
| Material: | Crocodile |
- Available on our Online E-Store grandseikoboutique.in
Clasp
XGN00118
INR 28,000.00
| Clasp width: | 18mm |
|---|---|
| Clasp material: | Stainless steel |
- Available on our Online E-Store grandseikoboutique.in
