Ref. SBGR257
The Grand Seiko Heritage, reference SBGR257, has a 39.4 mm steel case. The dial is covered by a dual-curved sapphire crystal with an inner anti-reflective coating. Self-winding calibre 9S65 has 35 jewels and approximately 72 hours of power reserve. Case thickness is 13.5 mm, with a lug-to-lug measurement of 46.8 mm; water resistance is rated to 100 metres. This model has a date display and a see-through case back. The case has a crown guard and a mirror finish achieved through Zaratsu polishing. The watch has a steel bracelet with a folding clasp with push button release.
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TECHNICAL SPECIFICATIONS
CASE
Diameter
39.4mm
Thickness
13.5mm
Lug to Lug
46.8mm
Lug Width
19mm
Case Material
Steel
Water Resistance
100m
Crystal
Sapphire Crystal
MOVEMENT
Movement Type
Automatic
Caliber
9S65
Power Reserve
72h
Frequency
28,800 vph (4 Hz)
Jewels
35 jewels
BRACELET/STRAP
Bracelet/Strap
Steel
Clasp Type
Fold Clasp
FEATURES & COMPLICATIONS
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QUICK FACTS
BRAND
Grand SeikoREFERENCE
SBGR257COLLECTION
HeritageMOVEMENT
AutomaticCALIBER
9S65CASE MATERIAL
SteelCRYSTAL
Sapphire CrystalWATER RESISTANCE
100m (swimming)FOR WATCH DEALERS
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