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
GRAND SEIKO SBGY013
Grand Seiko SBGY013 Specifications
- Exterior
Case Material Stainless steel Case Back Silver tone see-through screw with etched Grand Seiko logo Glass Material Dual-curved sapphire crystal Glass Coating Anti-reflective coating on inner surface Band Material Silver tone stainless steel nine-link bracelet Bezel Material Fixed polished stainless steel Dial Color Domed and textured ice-white inspired by snow-covered frozen surface of Lake Suwa with with engraved Grand Seiko logo below the 12 o’clock position, minute markers and Spring Drive logo at 6 o'clock position Dial Hands Tempered grey silver tone hour, minute, blue colored second hand with Zaratsu polished Dial Markers Grey silver tone batons with Zaratsu polished Crown Silver tone screw down at 3 o'clock position Case size Diameter 38.5 mm × Thickness 10.2 mm Lug to lug 43.7 mm Band width 19 mm Clasp type Three-fold clasp with push button release - Movement
Caliber no 9R31 Instructions Movement Type Spring Drive Power reserve Approximately 72 hours (3 days) Accuracy ±15 seconds per month (±1 second per day) - Functions / Specifications
Water resistance Splash Resistant Magnetic resistance Equipped (4,800 A/m) Functions Hour, minute, second hand Features - 30 jewels
- See-through screw case back
- Power reserve indicator

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GRAND SEIKO SBGY007
Grand Seiko SBGY007 Specifications
- Exterior
Case Material Stainless steel Glass Material Dual-curved sapphire crystal Glass Coating Anti-reflective coating on inner surface Band Material Black (front) and blue (back) crocodile leather strap with blue stitches Bezel Material Fixed polished stainless steel Dial Color Ice blue pattern with engraved Grand Seiko logo below the 12 o’clock position, minute markers and Spring Drive logo at 6 o'clock position Dial Hands Tempered grey silver tone hour, minute, blue colored second hand with Zaratsu polished Dial Markers Grey silver tone batons with Zaratsu polished Crown Screw down at 3 o'clock position Case size Diameter 38.5 mm × Thickness 10.2 mm Lug to lug 43.7 mm Clasp type Three-fold clasp with push button release - Movement
Caliber no 9R31 Instructions Movement Type Spring Drive Driving System Manual winding Power reserve Approximately 72 hours (3 days) Accuracy ±1 second per day / ±15 seconds per month (average) - Functions / Specifications
Water resistance Splash Resistant Magnetic resistance Equipped (4,800 A/m) Weight 68 g Functions Hour, minute, second hand Features - 30 jewels
- Case back with lion emblem
- Power reserve display
- Screw case back
- See-through case back
- Stop second hand function