Grand Seiko T0 Coaxial Remontoire Tourbillon

cazalea · 2020-09-03T06:26:12Z

Explore the Grand Seiko T0 Constant-force Tourbillon concept, a world-first integrated mechanism for ultimate precision. Discover its patented design and impact on mechanical watchmaking.

cazalea

WPS member · Seiko forum

11 replies3001 views5 photos

Cazalea introduces a significant concept from Grand Seiko: the T0 Constant-force Tourbillon. This article explores Grand Seiko's dedication to precision, showcasing a patented mechanism that integrates a constant-force device and tourbillon on the same axis. Readers gain insight into the innovative engineering that underpins Grand Seiko's mechanical watchmaking aspirations.

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The T0 (T-zero) Constant-force Tourbillon.

Grand Seiko reveals an exciting concept creation with a world’s-first mechanism.

Ever since the first Grand Seiko watch was born in 1960, the pursuit for high accuracy has been fundamental in every Grand Seiko timepiece and innovation. Today, a new and exciting moment in its 60-year history is marked by the introduction of the brand's first-ever concept creation.

The new creation is a masterwork and true revolution in watchmaking design and fully reveals the Grand Seiko designers' capabilities and ingenuity. The T0 (T-zero) Constant-force Tourbillon incorporates a fully integrated constant-force mechanism and tourbillon on the same axis for the first time in the world. The constant-force mechanism provides even energy distribution to the escapement regardless of how much the mainspring is wound, and the tourbillon eliminates the error in precision caused by gravity by incorporating the escapement parts and balance in a rotating carriage. These two mechanisms alone require exceptional design and manufacturing technologies, and the integration of the mechanisms as one unit is a patented design that achieves a new level of accuracy for Grand Seiko's mechanical watchmaking.

In pursuit of the highest level of accuracy for mechanical watchmaking, the designers conceptualized the new creation without restrictions from production capability considerations. The free approach to development resulted in the birth of T0 and inspired essential movement parts for the new Caliber 9SA5, which was developed in parallel with the concept creation.

T0 is displayed on the second-floor lounge of the Grand Seiko Studio Shizukuishi inaugurated on July 20, 2020, in Shizukuishi, Morioka.

The rotating tourbillon and intermittent turning of the constant-force as well as the rhythmical 16th note ticking sound of the mechanisms can be thoroughly enjoyed.

As soon as the Coronavirus situation allows, the new studio looks forward to welcoming visitors.

MORE DETAILS to come -- the patent illustrations and description are in a separate file below. Please explain the two images below -- if you can you are a better man than I!

Cazalea

Key Points from the Discussion

The T0 concept, with its integrated constant-force mechanism and tourbillon, represents a significant, long-term effort by Grand Seiko's brightest engineers, suggesting a future impact beyond a mere concept.
The introduction of such advanced mechanisms by Grand Seiko sparks discussion about their potential to surpass traditional Swiss chronometry, reminiscent of Seiko's historical performance in accuracy trials.

The Discussion

cazalea

Sep 3, 2020

NOTE: There's a good reason why we don't normally give you the text of patents. They are virtually impenetrable! Also available in French HERE Inventors Takuma Kawauchiya, Takashi Niwa, Masahiro Nakajima, Masayuki Koda Description THE CLAIMS 1. A constant force device for adjusting an output torque, comprising: an output unit (34) which produces the output torque by rotating about an output axis; a constant force spring (68) which provides a rotational force to the output unit (34); an input uni

als1678

Sep 3, 2020

Have to see the final watch, but looks like GS might be beating the Swiss yet again ... Remember how the chronometry trials ended when Seiko started winning in the 1960's ?

cazalea

Sep 3, 2020

We said the same thing about the Credor Tourbillon and Grand Sonnerie

Ronald Held

Sep 3, 2020

Even if I never could afford it?

irishger

Sep 3, 2020

Is there any watch? Development for developments sake?

jml_watches

Sep 3, 2020

I think I'll pass on reading that let alone trying to understand it! Cheers JML

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Grand Seiko T0 Coaxial Remontoire Tourbillon

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