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The Grand Seiko SLGC009 is the Tokyo Lion Tentagraph, a 2025 Sport Collection chronograph pairing a lion-inspired design with the automatic Calibre 9SC5. Its listed dimensions are 43.0 mm wide, 50.0 mm long and 15.6 mm thick; Grand Seiko specifies a 72-hour power reserve and 20 bar water resistance. The announced Japanese price was ¥2,310,000 including tax, while the Australian launch announcement listed A$24,500.
What is the Grand Seiko SLGC009?
SLGC009 is Grand Seiko’s Tokyo Lion Tentagraph, a mechanical chronograph in the Sport Collection. Grand Seiko announced it on April 1, 2025, with a Japanese release date of August 8, 2025. The name combines the Tokyo Lion design with Tentagraph, the brand’s designation for this automatic chronograph.
The case is made of brilliant hard titanium and paired with a rubber strap. Grand Seiko says the case form draws on the lion’s imposing presence and powerful claws. The English launch announcement describes the dial pattern as inspired by a lion’s mane flowing in the wind. It also says a slightly curved case back and rubber strap are intended to support comfort and stability; these are the manufacturer’s design aims, not an independent assessment of fit.
SLGC009 specifications
| Specification | Grand Seiko listing |
|---|---|
| Collection and design | Sport Collection; Tokyo Lion Tentagraph |
| Movement | Automatic mechanical Calibre 9SC5, with manual winding |
| Frequency | 36,000 vibrations per hour, or 10 beats per second |
| Power reserve | Approximately 72 hours when fully wound |
| Accuracy | Static: +5 to −3 seconds per day; wearing: +8 to −1 seconds per day |
| Case dimensions | 43.0 mm wide × 50.0 mm long × 15.6 mm thick |
| Weight | 139 g |
| Case and strap | Brilliant hard titanium case; rubber strap |
| Band width | 23 mm |
| Crystal and back | Box-shaped sapphire crystal with inner anti-reflective coating; see-through back |
| Water resistance | 20 bar |
| Other listed features | Magnetic resistance; screw-lock crown; 60 jewels |
| Chronograph counters | 30-minute and 12-hour counters |
How the 9SC5 chronograph works
Grand Seiko’s launch explanation describes a vertical clutch and column wheel in the 9SC5. The company says the vertical clutch reduces hand shudder or jumping when the chronograph starts, while the column wheel controls chronograph operation. A three-pointed hammer returns the hands to zero in synchronization. These are the manufacturer’s descriptions of the mechanism, rather than independently measured performance claims.
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The 36,000-vibrations-per-hour frequency is equivalent to 10 beats per second. Grand Seiko lists 60 jewels and an approximately 72-hour reserve for the calibre. The 30-minute and 12-hour counters provide the chronograph’s elapsed-time displays.
What the accuracy figures mean
Grand Seiko lists static accuracy of +5 to −3 seconds per day and wearing accuracy of +8 to −1 seconds per day. The static figure is measured on the movement before shipment under the manufacturer’s conditions; it is not a guarantee of the rate in everyday use. Grand Seiko notes that wearing results can vary with wearing time, temperature, arm movement, shocks and vibration.
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Price and release information
Grand Seiko’s Japanese launch announcement set a recommended retail price of ¥2,310,000 including tax and an August 8, 2025 release date in Japan. Its Australian launch announcement listed a recommended retail price of A$24,500. These are market-specific launch prices, not a single global price or confirmation of current retail pricing. The Japanese boutique listing displayed the model as not in stock when checked on October 4, 2026; that listing does not establish availability elsewhere.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Size and fit considerations
The 43.0 mm width, 50.0 mm length, 15.6 mm thickness and 139 g listed weight give a more complete sense of the watch’s scale than diameter alone. The 23 mm band width is useful when checking strap options, but width by itself does not establish that a replacement strap will fit: case-end shape, attachment and clasp compatibility also matter. Measurements cannot determine how the watch will feel on a particular wrist.
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