In-Depth: The Grand Seiko Tentagraph SLGC001
Twenty twenty-one was an important year for Grand Seiko as it saw the introduction of the brand’s latest-generation mechanical movement, the cal. 9SA5. A modern movement with attractive aesthetic and proprietary escapement, the cal. 9SA5 debuted in the Heritage “White Birch” SLGH005. But Grand Seiko didn’t stop there. Building upon the flagship calibre, Grand Seiko created the cal. 9SC5 and launched the Grand Seiko Tentagraph SLGC001. A large, sporty watch but entirely in lightweight titanium, the Tentagraph is a milestone for Grand Seiko (GS) as the brand’s first-ever mechanical chronograph. “Tentagraph” is self-explanatory, an acronym outlining the key features of the watch and cal. 9SC5 within: TEN beats per second, Three-day power reserve, Automatic winding, and chronoGRAPH. Initial thoughts The Tentagraph has all the tactile features expected in a modern, high-spec sports chronograph, namely substantial proportions and crisp, smooth pusher action. As expected for GS, it boasts high quality finishing inside and out, with the case in particular having category-leading finishing and detailing. And from a technical perspective, it is notable for being the high-frequency chronograph with the longest power reserve on the market – the balance runs at 36,000 beats per hour, or 5 Hz, and the power reserve is 72 hours, or three days. Aesthetically, the Tentagraph is refreshingly modern. It retains the characteristic GS design, but tweaked to accentuate the sport...
Time+Tide
