![]() ![]() The movement features the revolutionary 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. Beating ten times per second, the movement ensures high accuracy when measuring elapsed time as well as the time of day. “The Tentagraph is powered by the high-beat automatic chronograph movement, Caliber 9SC5. To achieve a watch of this caliber, what were the technological advancements incorporated into the Tentagraph that differentiate it from other high-end chronograph watches? The hands and grooved indexes are lumed for visibility. The subdials at three, nine, and twelve are recessed, giving the dial even more depth. Iwate pattern,” which is called after the mountain seen from Studio Shizukuishi. Reviewing the watch, the deep blue color was inspired by the night sky above the mountain and is part of Grand Seiko’s “Mt. Every component in every Grand Seiko movement is made in-house, including the mainspring and hairspring in the mechanical movements.” We have our own R&D, design, and production capabilities, as well as over 100 years of experience in high-level watchmaking. Grand Seiko is also the only Japanese watchmaker that is a true, fully integrated “manufacture”. The beautiful mirror surface finishing made possible by the “Zaratsu” polishing technique, side by side with the hairline finished surfaces of the case, creates expressions of light and shadow that emit beautiful sparkles and illuminate the whole watch. ![]() The harmonious interplay of light and shadow is central to the Japanese idea of beauty and is true to the ideals of Grand Seiko. ![]() It celebrates the Japanese spirituality of time that is deeply inspired by nature and brought to life by Takumi, or Japanese craftsmanship. For example, Grand Seiko’s brand philosophy, The Nature of Time, reflects the Japanese respect towards nature, which is at the center of Grand Seiko’s watchmaking. Grand Seiko is deeply rooted in its Japanese heritage and this is expressed in our timepieces. To this, Akio Naito, President of Seiko Watch Corporation said, “We have been communicating our high-quality watchmaking and the uniquely Japanese qualities of Grand Seiko to watch fans worldwide to differentiate ourselves from our counterparts. How does Grand Seiko leverage its legacy and reputation to compete with the other players in the luxury watch market? The heritage and reputation of a brand can significantly impact customers’ perceptions. Based on Grand Seiko’s research as quoted by Akio Naito, President of Seiko Watch Corporation. And if this wasn’t enough to make it compete against several other luxury watches in this price range, together with this Dual Impulse Escapement, Caliber 9SC5 incorporates two barrels allowing the watch to run for three days even when the chronograph is in operation, making the Tentagraph the 10-beat chronograph with the longest power reserve in the industry today (as of March 2023). Seeped in Japanese tradition this is also Grand Seiko’s first mechanical chronograph in the Evolution 9 Collection powered by the 9SC5 Caliber and using the 9SA5 caliber at its base. That’s how the name came about and quite accurately defines the watch. Ten beats per second, a Three Day power reserve and an Automatic Chrono graph.
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