Grand Seiko SBGR257

Features

A high-quality 3-day automatic

The watch has a 3-day power reserve and combines the latest in hairspring technology with an escapement developed through the MEMS technology to achieve high accuracy and stability when worn.

The stately crown guard and lugs complement the shine given off by the mirror-finish achieved through multi-faceted Zaratsu polishing. The case's mirror-finish produces a lustrous shine achieved through multi-faceted Zaratsu polishing.

The delicacy, strength and beauty of the movement can be enjoyed the exhibition case back.

Specifications

Exterior

Exterior: Stainless steel

Case back: See-through & Screw case back

Glass Material: Dual-curved sapphire crystal

Glass Coating: Anti-reflective coating on inner surface

Case size: Diameter 39.4mm

Lug-to-lug 46.8mm

Thickness 13.5mm

Band width: 19mm

Clasp type: Three-fold clasp with push button release

The perimeter of Band: 206mm

Movement

Caliber no.: 9S65 Instructions

‍Movement Type: Automatic with manual winding

Power reserve: Approx. 72 hours (3 days)

Mean daily rate: +5 to -3 seconds per day

• Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days.

Functions

Water resistance: 10 bar

Magnetic resistance: 4,800 A/m

Other details / Features:

• Screw-down crown
• 35 jewels