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

SBGA391G
Limited edition of 200 pcs

SBGA391

Sport Collection

Buy at online store

Search Stores

Features

Specifications

Exterior
Exterior: Stainless steel
Case back: Screw case back
Glass Material: Sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
LumiBrite: Lumibrite on hands and index(es)
Case size: Diameter 44.2mm Lug-to-lug 51.0mm Thickness 14.0mm
Band width: 22mm
Clasp type: Three-fold clasp with secure lock & push button release, solid & slide adjuster
Movement
Caliber no.: 9R65 Instructions
Movement Type: Spring Drive
Power reserve: Approx. 72 hours(3 days)
Accuracy: ±15 seconds per month (±1 second per day)
Functions
Magnetic resistance: 4,800 A/m
Other details / Features:
  • LIMITED EDITION on the case back
  • Serial number engraved on the case back
  • Unidirectional rotating bezel
  • Screw-down crown
  • 30 jewels
  • Power reserve indicator
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 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.