Grand Seiko - SBGC231G

Exterior
Case Material :High-intensity titanium /ceramic with
ceramic bezel

Glass Material: Dual curved sapphire

Glass Coating :

Anti-reflective coating on inner
surface

Lumi Brite :
Lumibrite on hands and index

Case size :
Diameter
46.4 mm × Thickness 16.2 mm

The perimeter of Band: 190 mm

Clasp Type :
Three
fold clasp with push-button release

Movement Caliber no. : 9 R 86

Movement Type: Spring Drive

Power reserve: Approx. 72 hours( 3
days)

Accuracy :
±
1 second per day / 15 seconds per
month (average)

Functions

Water resistance: 10 bar

Magnetic resistance: Equipped

Weight : 158.0 g

Other details / Features :

・ 24 hour hand (dual time display
function)

50 jewels

Against an allergic reaction to metal

Calendar linked time difference
adjustment function

Case back with lion emblem

Chronograph with 30 minutes & 12
hours

Power reserve display
Screw case back
Screw down crown
See-through case back
Stop second-hand function