Grand Seiko Evolution 9 Collection SLGH011 Replica Watch

New: The first Grand Seiko mechanical chronograph – the Tentagraph. Grand Seiko presents the first mechanical chronograph – the Tentagraph.

A line extension of the Evolution 9 series, the new chronographs add an interesting element to the Grand Seiko mechanical lineup. So far, the only chronograph of this level in the GS collection is the powerful Spring Drive chronograph that we really like. This is the first time GS has released a mechanical chronograph. An early version of their mechanical chronograph was the Caliber 9SA5, which was only used on Seiko watches.

The new Tentagraph 9SC5 caliber is high frequency (36,000 bph) and is run by two barrels. Seiko claims a three-day power reserve is the highest of any chronograph on the market. This power reserve is retained even when the chronograph is running. The aesthetic is typical Grand Seiko, referencing GS design codes and zaratsu finishing. The titanium case measures 43.2mm.

Last year, at the Watches & Wonders Fair in Geneva, Grand Seiko presented its first mechanical complication and a series of sports watches in the Evolution 9 collection. Today marks a new milestone as Grand Seiko expands its line of Evolution 9 sports watches with the launch of the Tentagraph, its first mechanical chronograph.

As with every Grand Seiko creation, the quest for precision is at the heart of the new Tenta-graph, whose chronograph movement is based on the revolutionary high-frequency Caliber 9SA5. Like the Caliber 9SA5, the new Tentagraph Caliber 9SC5 beats ten times per second, ensuring high precision when measuring elapsed time as well as the time of day. And, thanks to the energy-saving escapement and two barrels, the watch can run for three days even when the chronograph is running, making the Tentagraph the longest power reserve 10-beat chronograph in the industry today. * Additionally, Tentagraph accepts new, longer testing procedures. Like all Grand Seiko mechanical movements, the Tentagraph's timekeeping accuracy is evaluated over 17 days at six positions and three temperatures, but in addition, there are three days of testing during which the chronograph's performance in three positions is evaluated. accuracy. Therefore, each Tentagraph movement is tested for a total of 20 days to ensure that it meets the Grand Seiko standard of +5 to -3 seconds per day.

With the new Tentagraph, Grand Seiko adds a new dimension to its sports watch collection, opening a new chapter in its history.

*As of March 2023. Based on research by Grand Seiko.

The new movement features a revolutionary double-pulse escapement, which efficiently transmits energy to the free-sprung balance, either indirectly via the pallet or directly from the escape wheel. MEMS technology ensures that the escapement components are extremely precise, lightweight and highly durable, while at the same time endowing the escapement with greater energy efficiency for a longer power reserve.

The hallmarks of a high-quality modern chronograph, the vertical clutch and column wheel ensure high precision and maneuverability. The vertical clutch eliminates any chattering or jumping of the hands when the chronograph is engaged and improves measurement accuracy, while the column wheel provides precise control over the operation of the chronograph. The movement uses a three-pointed hammer to ensure that when the reset button is pressed, the hands immediately return to zero and are perfectly synchronized.

True to the Grand Seiko ideal, the Evolution 9 sports watch

The ideals of a Grand Seiko sports watch are evident in this new chronograph. The Evolution 9 Style's powerful hands and prominent fluted indexes ensure high legibility. The chronograph seconds hand curves down slightly towards the dial so that the tip of the hand is as close as possible to the dial markers and extends to the markers on the very edge of the dial. The minute hand is also gently curved to ensure legibility of the time of day. The case and bracelet are made of high-strength titanium, approximately 30% lighter than stainless steel and more scratch-resistant for maximum durability, and the two convex buttons ensure the operability required to measure elapsed time at the highest level .

The dial is engraved with Grand Seiko's signature "Mt. Iwate pattern" inspired by the ridged silhouette of the nearby mountains that can be seen through the windows of Grand Seiko's Shizukuishi workshop, where the Tentagraph and all other Grand Seiko mechanical watches are found Assembled and tuned by hand. The Mount Iwate dial first appeared in 2006, and the motif has been closely associated with Grand Seiko mechanical watchmaking ever since. The majestic mountain is an enduring source of inspiration for Grand Seiko, and its choice for the brand's first mechanical chronograph is both symbolic and fitting. The combination of the dial and the soft blue tone leads people's imagination to the night sky above Mount Iwate.

Grand Seiko Evolution 9 Collection Tentagraph: SLGC001
Caliber 9SC5
Drive system: automatic
Frequency: 36,000 vibrations per hour (10 vibrations per second)
Accuracy (daily average frequency): +5 to -3 seconds per day
Power reserve: 72 hours
Chronograph with 30-minute counter at 9 o'clock and 12-hour counter at 6 o'clock
Number of gems: 60
Diameter: 33.0mm, Thickness: 8.0mm

Specification
High-strength titanium case and bracelet
Box-shaped sapphire crystal with anti-reflective coating. Transparent screw case back. Screw-down crown. Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Diameter: 43.2mm, Thickness: 15.3mm
Three-fold clasp with push button release