Grand Seiko is all about pushing the boundaries of excellence and what’s capable in watchmaking – all while maintaining their brand vision. At Watches and Wonders 2023 the iconic Japanese brand shared their next innovative vision for their product line’s direction: the SLG001G Tentagraph, their first ever mechanical chronograph.

Powered by the newly developed Grand Seiko 9SC5 mechanical chronograph movement, the Tentagraph features a titanium construction, ceramic bezel, and a beautifully textured dial designed pay homage to Mt. Iwate.

Grand Seiko SLGC001G Tentagraph Specs

Case Size:43.2mm x 51.5mm x 15.3mm
Power Reserve: 72 hours (longest running 10-beat chronograph on the market today)
Accuracy:+5 / -3 seconds per day
Crystal:Sapphire Crystal
Water Resistance:10 ATM (100 Meters)
Price:$13,700 USD

The Grand Seiko 9SC5 mechanical movement is using the 9SA5 as a base movement. As such, this means two things for the Tentagraph: 1) it is technically a hi-beat chronograph; and 2) it’s also quite thick at 15.3mm. However the technical achievement of turning their hi-beat movement into a chronograph is incredibly impressive and we’re excited to see how this movement is further improved upon and utilized down the road.

As far as my initial impressions in regards to the watch as a whole, for me all that’s noteworthy is under the hood. The overall design and presentation of this chronograph within the Evolution 9 product line is ultimately forgettable when compared to other chronographs on the market. That’s an especially poignant realization when coupled with the fact that at the price point of $13,700 USD, there are many, many other chronographs in play that could be purchased (with money left over).

Images courtesy of Grand Seiko

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