Grand Seiko ‘Tentagraph’ Hi Beat Automatic Chronograph

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.

Guarantee: Five-year transferable guarantee with no registration or periodic maintenance checks required

Case: 43.2mm high-intensity titanium case with Zaratsu polished finish

Movement: Hi-Beat automatic movement. Calibre 9SC5, accurate to +5 / -3 seconds per day

Power Reserve: Power reserve of approximately 72 hours (3 days)

Winding Crown: High-intensity titanium crown with the Grand Seiko logo in relief

Waterproofness: 100m water resistant

Bezel: Fixed, scratch resistant bezel

Dial: Midnight blue

Crystal: Sapphire crystal

Bracelet: Titanium, 3-link bracelet