Grand Seiko SBGJ277

Specifications

Exterior

Exterior:

Stainless steel

Case back:

Screw case back

Glass Material:

Dual-curved sapphire crystal

Glass Coating:

Anti-reflective coating on inner surface

LumiBrite:

LumiBrite on hands, index(es) and bezel

Case size:

Diameter 44.2mm

Lug-to-lug 50.6mm

Thickness 14.4mm

Band width: 21mm

Clasp type: Three-fold clasp with push button release

The perimeter of Band: 201mm

Movement

Caliber no.: 9S86

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: 20 bar

Magnetic resistance: 4,800 A/m

Weight: 188 g

Other details / Features:

• Rotating bezel (24-hour display)
• Screw-down crown
• 37 jewels
• 24-hour hand (dual time display function)
• Calendar-linked time difference adjustment function