The case and bracelet are made of high-intensity titanium, which is about 30% lighter and more scratch resistant than stainless steel to maximize durability. They have produced an extremely good looking chronograph. The Grand Seiko Tentagraph isn’t just about the movement however. This assists in generating greater efficiency, which in turn, gives the Calibre 9SC5 its long power reserve. Grand Seiko have given the Tentagraph their new Dual Impulse Escapement, which efficiently transfers energy to the free-sprung balance wheel indirectly through the pallet fork and also directly from the escape wheel. Whilst we’re nerding out on the movement, it would be wrong of us to leave out the next part. Grand Seiko Tentagraph Calibre 9SC5 beautifully finished This ensures that the movement is accurate to -3/+5 seconds per day. Firstly it assesses it in six positions and at three temperatures over 17 days, then it tests over an additional 3 days whilst the chronograph is in operation. Grand Seiko also make sure that the Tentagraph is tested and running to their exacting standards. Grand Seiko, not one to do things by halves, has given the Tentagraph two barrels so the watch runs for three days even when the chronograph is in operation, making (according to Grand Seiko research) the Tentagraph the 10-beat chronograph with the longest power reserve in the industry today.
Like Calibre 9SA5, the new Tentagraph Calibre 9SC5 beats ten times per second, ensuring high accuracy when measuring elapsed time as well as the time of day.
Grand seiko chronograph full#
The Grand Seiko Tentagraph however is a full automatic movement based on the revolutionary high-beat Calibre 9SA5. The new Grand Seiko Tentagraph with deep blue dial evoking the night sky above Mt Iwate.
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