Grand Seiko Evolution 9 Diver 5-Days Spring Drive Blue MB – 43.8 mm

Reference Number
SLGA023G

Featuring the Evolution 9 Style, 200 meters of water resistance, and a blue variation on the “ushio” dial initially seen in 2022 in black, the new Reference SLGA023 is the latest diver’s watch from Grand Seiko. Below its distinctive, patterned dial is the Spring Drive Caliber 9RA5, a next-generation movement with automatic winding, ±10 seconds per month accuracy, and a power reserve of 120, or about five days, when fully wound.

TECHNICAL SPECIFICATIONS

Exterior
Exterior: High-intensity titanium
Case back: Screw case back
Glass Material: Sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
LumiBrite: LumiBrite on hands, index(es) and bezel
Case size: Diameter 43.8mm Lug-to-lug 51.5mm Thickness 13.8mm
Band width: 23mm
Clasp type: Three-fold clasp with secure lock & push button release, solid & slide adjuster
The perimeter of Band: 185mm

Movement
Caliber no.: 9RA5 Instructions
Movement Type: Spring Drive
Accuracy: ±10 seconds per month (±0.5 second per day)

Functions
Magnetic resistance: 4,800 A/m
Other details / Features:
– Unidirectional rotating bezel
– Screw-down crown
– Three-fold clasp with secure lock
– Power reserve indicator