Grand Seiko Tentagraph: Accurate towards the tenth of a second

The Grand Seiko Tentagraph, model SLGC001 with a ti case and titanium pendant, is an interesting novelty.



Grand Seiko highlights the first fully mechanical time counter. It's called the Grand Seiko Tentagraph, and it stops moment precisely. The chronograph is simply not satisfied with being accurate for the second, or even stops on the tenth of a second.



Grand Seiko Elite

The watch, called the Grand Seiko Tentagraph, is yet another planet first. Unlike Seiko, so far as I know, there has never recently been a 100% mechanical stop-watch with this logo.



Introduced in 2007, Competence 9R86 features a stopwatch perform and an unusual but now attribute totalizer arrangement that actions time with the help of a Early spring Drive regulator developed by Huge Seiko. In other words, it has digital components. In contrast, the built-in stop function and straight friction clutch with vertebral column wheel control, invented simply by Seiko in the late 1960s, operates purely mechanically. As such, this can be a hybrid chronograph.



Base Caliber 9SA5

Very different from the Tentagraph proven at Watches & Amazing things in 2023. As the label suggests, it stops into the nearest tenth of a next.



The programmed movement 9SA5 launched inside 2021 makes all this achievable. In this article, Watch Universe provides reported in detail on this movements with its innovative double-pulse escapement.



At this moment, simply no amount of words are unnecessary. It's no surprise, then, that will Grand Seiko expanded it is mechanical collection to include more important gaming features., taking its 31. 6mm and 5. 18mm large flagship movement (with self-winding oscillating weight on both sides). The chronograph is evident. In this case, in contrast to the 9R86, the stop function is absolutely not integrated into the movement, yet mounted as a module in its appearance of the ticking base. This specific addition increases the diameter on the new Caliber 9SC5 for you to 33 mm. The overall level is eight millimeters. Coming from these figures, the height with the board was calculated to get 2 . 82 mm, like the components attached to it intended for stopping time.



Of course classic

Rationally, vertical friction coupling ensures the connection between the two tiers. The classic column wheel is accountable to controlling the three functions regarding start, stop and no position. Like the Eta 2894-A2 or the module of the Deluxe specialist Dubois-Dépraz, the long lasting seconds hand rotates from " 3" on the proper. Totalizers, on the other hand, can total to 30 minutes. A Grand Seiko technician puts the 12-wheel accumulator at " 6". Normally, between " 4" and " 5" will be the date indication window.



Titanium case and also strap

The fact that Grand Seiko uses the 9SC5 module movement, which sways at 5 Hz, regarding the sporty Evolution on the lookout for line is quite evident. In such cases, the screw-down crown event is made of so-called high-strength ti. Combined with a three-row website link bracelet, this certainly causes it to be significantly lighter than a bracelets that uses high-quality iron.



The allergies properties of the selected supplies can also be considered a plus. The particular ceramic fixed bezel includes a tachymeter scale for effortlessly recording average speeds more than a kilometer or a mile.



The waterproof efficiency of the 43. 8mm scenario is 15. 3mm heavy when worn on the wrist, and will withstand pressures up to five bars. Its high-quality Zaratzu polish can be taken for granted.



Equally striking fluorescent hands rotate in front of some sort of Mount Iwate-inspired blue face with unique luminescent hour or so markers engraved on the watch dial.



As usual, a new 17-day accuracy check has been performed at six places at three different temperature ranges. Then, with the chronograph started up, the finished watch can be utilized for another three days. Simply three locations are analyzed here. Finally, the average items had to move within a totally defined range every day to get 20 days, from a more minus 3 seconds to help plus 5 seconds. This is certainly stricter than the official Switzerland chronometer standard, which is today outdated.



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Great Seiko specifies that the reserve of power of the 9SC5 caliber (more on the mechanics of the Awesome Seiko 9S caliber) is strictly three days when the end function is activated. Which eight hours less than 9SA5. Additional mechanics cost vitality. However , if you wear the Tentagraph regularly, this is hardly a concern due to its efficient self-winding device.