Grand Seiko Sport Collection Stainless Steel, Caseback:Stainless Steel and Sapphire Crystal Spring Drive GMT 44mm SBGE277

Exterior: Stainless steel, Caseback:Stainless steel and sapphire crystal
Case back: Screw case back
Glass Material: Dual-curved sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
LumiBrite: LumiBrite on hands, index(es) and bezel
Case size: Diameter 44.0mm Lug-to-lug 50.8mm Thickness 14.7mm
Band width: 21mm
Clasp type: Three-fold clasp with push button release
The perimeter of Band: 194mm
Caliber no.: 9R66 Instructions
Movement Type: Spring Drive
Power reserve: Approx. 72 hours(3 days)
Accuracy: ±15 seconds per month (±1 second per day)
Water resistance: 20 bar
Magnetic resistance: 4,800 A/m
Weight: 186 g
Other details / Features: Rotating bezel, Screw-down crown, 30 jewels, 24-hour hand (dual time display function), Power reserve indicator, Calendar-linked time difference adjustment function