Masterpiece Collection

A unique series from a unique watchmaking studio

Evolution 9 Collection

A new design for a new era

Heritage Collection

Breathing new life into tradition

Sport Collection

Designed for those who love sport and aim high

Elegance Collection

Contemporary elegance for exceptional occasions
Collections
World of Grand Seiko
News
Support
Stores
Country/Area

SBGH345G

SBGH345

Heritage Collection

Boutique Online

Search Stores

  • Available at the Grand Seiko Boutique Online only

Features

Specifications

Exterior
Exterior: Ever brilliant steel, Caseback: Ever brilliant steel and sapphire crystal
Case back: See-through & Screw case back
Glass Material: Dual-curved sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
Case size: Diameter 40.0mm Lug-to-lug 46.2mm Thickness 13.3mm
Band width: 19mm
Clasp type: Three-fold clasp with push button release
The perimeter of Band: 200mm
Movement
Caliber no.: 9S85 Instructions
Movement Type: Automatic with manual winding
Power reserve: Approx. 55 hours
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.
Normal usage accuracy: +8 to -1 seconds per day
Functions
Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Weight: 154 g
Other details / Features:
  • Screw-down crown
  • 37 jewels

Ever-Brilliant Steel with superior corrosion resistance

Ever-Brilliant Steel is a stainless-steel material that boasts higher corrosion resistance than the stainless steel used in regular high-end watches (indeed, it has the highest level of corrosion resistance in the world), one that shines with a brilliant white. Ever-Brilliant Steel has a PREN (pitting resistance equivalent number) that is 1.7 times that of the steel typically seen in luxury watches.

Learn more

Watch finder

The three movements at the heart of Grand Seiko

9SMechanical

One of the world's foremost mechanical movements, the culmination of high-precision micro-engineering and the attention to detail of Grand Seiko's expert watchmakers.

9RSpring Drive

Spring Drive’s unique movement technology generates power through a mainspring like other mechanical watches but combines this with the Tri-synchro Regulator for extraordinary precision.

9F Quartz

The ultimate quartz movement. Caliber 9F incorporates several unique technologies that raise the performance of quartz to the high standards of Grand Seiko.