Grand Seiko SLGC001

Features

High-beat precision and three days of power reserve come together in the new Tentagraph, Grand Seiko’s first mechanical chronograph.

The Tentagraph, an automatic high-beat chronograph, is the first watch of its kind from Grand Seiko. Powered by the new Caliber 9SC5, which uses the Caliber 9SA5 as its base, it is emblematic of the next generation of Grand Seiko sports watches, both for its technological innovation and its equally stunning Evolution 9 Style. With a power reserve of 72 hours, the Tentagraph is the longest-running 10-beat chronograph on the market today. And its design has been fully updated for active use and easy reading while in motion.

The Tentagraph’s case and bracelet are made from High-intensity titanium, which is about 30 percent lighter and more scratch resistant than stainless steel, and its bezel is made from scratch-resistant ceramic. The watch’s dial pattern evokes the magnificence of Mt. Iwate, the soaring peak visible from the Grand Seiko Studio Shizukuishi.

Specifications

Exterior

Case back: See-through & Screw case back

Glass Material: Box shaped sapphire crystal

Glass Coating: Anti-reflective coating on inner surface

LumiBrite: Lumibrite on hands and index(es)

Case size: Diameter 43.2mm Lug-to-lug 51.5mm Thickness 15.3mm

Band width: 23mm

Clasp type: Three-fold clasp with push button release

Movement

Caliber no.: 9SC5

Movement Type: Automatic with manual winding

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
• Allergy-safe metal
• Chronograph with 30 minutes & 12 hours