Grand Seiko SBGE255

Exterior

Case Material : Stainless steel with ceramic bezel
Glass Material : Dual-curved sapphire crystal
Glass Coating : Anti-reflective coating on inner surface
LumiBrite : Lumibrite on hands and index(es)
Case size : Diameter 40.5mm Lug-to-lug 48.7mm Thickness 14.7mm
Clasp type : Three-fold clasp with push button release

Movement

Calibre no. : 9R66
Movement Type : Spring Drive
Power reserve : Approx. 72 hours(3 days)
Accuracy : ±15 seconds per month (±1 second per day)

Functions

Water resistance : 20 bar
Magnetic resistance : 4,800 A/m
Weight : 172.0 g
Other details / Features :

・24-hour hand (dual time display function)
・30 jewels
・Calendar-linked time difference adjustment function
・Case back with lion emblem
・Date display
・Power reserve indicator
・Screw case back
・Screw-down crown
・Stop seconds hand function