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Grand Seiko Evolution 9 Spring Drive U.F.A.

Grand Seiko Evolution 9 Spring Drive U.F.A.

Spring DriveTitanium

Ref. SLGB025

Collection: Evolution 9Case size: 40.8mmMovement: 9RB1

The Grand Seiko Evolution 9 Spring Drive U.F.A., reference SLGB025, is a dive watch with a 40.8 mm titanium case. The case measures 12.9 mm thick and 48.5 mm lug-to-lug; water resistance is rated to 300 metres. Approximately 72 hours of power reserve is provided by Spring Drive calibre 9RB1, with 33 jewels. A sapphire crystal has an anti-reflective coating on the inner surface. The watch has a power reserve indicator; the bezel rotates unidirectionally. The green dial has a gradient pattern inspired by shallow coastal waters. The titanium bracelet has a folding extension clasp with a lock and micro-adjustment.

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Last updated 9 Oct 2026Suggest a correction

TECHNICAL SPECIFICATIONS

CASE

Diameter

40.8mm

Thickness

12.9mm

Lug to Lug

48.5mm

Lug Width

21mm

Case Material

Titanium

Water Resistance

300m

Crystal

Sapphire Crystal

MOVEMENT

Movement Type

Spring Drive

Caliber

9RB1

Power Reserve

72h

Jewels

33 jewels

DIAL

Dial Color

Green

BRACELET/STRAP

Bracelet/Strap

Titanium

Clasp Type

Fold Clasp

FEATURES & COMPLICATIONS

Luminous handsLuminous indicesPower Reserve DisplayRotating BezelScrew-Down Crown

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