Grand Seiko
Tentagraph is a new addition to Grand Seiko’s range of sports watches. The name comes from the watch’s features: Ten (Ten beats per second) T (Three days) A (automatic) Graph (Chronograph). With the debut of this timepiece, Grand Seiko adds a new dimension to its range of sports watches. The watch beats with a new movement that features the revolutionary Dual Impulse Escapement, which transfers energy to the free-sprung balance wheel indirectly through the pallet fork and directly from the escape wheel.
This modern chronograph has a vertical clutch and a column wheel to ensure high accuracy. With the vertical clutch mechanism, the hands of the chronograph move seamlessly without any glitches, resulting in improved measurement accuracy. Additionally, the column wheel system provides precise control over the chronograph operation, further enhancing its functionality. The movement incorporates a three-pointed hammer, ensuring that when the reset pusher is pressed, the hands return to zero instantly and perfectly synchronised.
The case and bracelet are made of high-intensity titanium, which is about 30% lighter and more scratch resistant than stainless steel to maximise durability, and the two convex pushers ensure the operability required for measuring elapsed time at the highest level.
One of the new timepieces launched at Watches and Wonders is the Grand Seiko manual-winding Spring Drive, which comes with a fully engraved Platinum 950 case. The silver-coloured dial and case are designed to showcase the natural beauty of the forest.
In the eastern part of Shinshu, at the foot of the North Yatsugatake Mountains, lies an expansive forest of white birch trees. Nearby in Shiojiri, skilled craftsmen and women produce handmade Grand Seiko watches, drawing inspiration from the local scenery and changing seasons.
The dial features the celebrated Shinshu white birch pattern familiar to Grand Seiko fans, yet this masterpiece’s dial has a slightly different tone and a more metallic texture, causing it to shine subtly under the light.
The hour and minute hands, as well as each hand-applied diamond-cut marker, are made of 14k white gold to ensure a sharp and brilliant finish, while the minute track, the lettering and the mark at six o’clock are all carved into the dial. The second hand is tempered to a beautiful shade of grey.