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Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →The Grand Seiko STGK011 and STGK013 are compact, diamond-set automatic watches introduced in 2019. Their main difference is the dial: the STGK011 has a textured silver-colored dial, while the STGK013 pairs a deep purple mother-of-pearl dial with the same steel case, diamonds, and caliber 9S27.
What distinguishes the STGK011 from the STGK013?
| Model | Dial | Shared details |
|---|---|---|
| STGK011 | Silver-colored, with a fine crystalline texture | Two diamond hour markers at 12 o’clock; diamond-set stainless-steel case; automatic caliber 9S27 |
| STGK013 | Deep purple mother-of-pearl, called “Koki-murasaki” in Grand Seiko’s launch coverage | Two diamond hour markers at 12 o’clock; diamond-set stainless-steel case; automatic caliber 9S27 |
The choice is primarily visual: the STGK011’s silver surface has a restrained, textured look; the STGK013’s mother-of-pearl gives the dial a more distinctive purple appearance. Grand Seiko describes that hue as dignified and deep. The official specifications establish no mechanical-performance difference between the two.
How the design and size compare
Grand Seiko announced the pair on September 26, 2019, as women’s automatic watches in its Elegance Collection. The company said they would be available from October through Grand Seiko Boutiques, selected Seiko Boutiques, and other retail partners worldwide. Its launch announcement described them as Elegance Collection watches; the Japanese model pages currently classify them under the Heritage Collection. Those labels reflect different points in the models’ history, not different watches.
The bezel-less, curved case takes design inspiration from the silhouette of Grand Seiko’s 1967 62GS. That is a stated design reference, not a claim that either STGK model is a reissue of the 62GS.
#1 Best Overall
- Calendar-linked time difference adjustment function
- Movement Caliber 9S86,
- Dual-curved sapphire crystal
- Case and bracelet: stainless steel
- Dimensions: 30.6 mm wide × 36.0 mm long × 12.7 mm thick
- Crystal: dual-curved sapphire with an interior anti-reflective coating
- Caseback: see-through screw caseback
- Clasp: three-fold clasp with push-button release
- Weight: 84 g, as listed on the Japanese model pages
- Maximum bracelet circumference: 180 mm, as listed on the Japanese model pages
- Diamonds: 40 in total, weighing 0.41 carat; Grand Seiko’s launch announcement specifies 38 on the case and two on the dial
- Water resistance: 10 bar
- Magnetic resistance: 4,800 A/m, as stated in the launch announcement
The water-resistance figure is the manufacturer’s specification; it does not establish that a particular pre-owned watch still meets that rating. Have a used watch checked if its condition or service history is uncertain.
Caliber 9S27 and accuracy
Both references use Grand Seiko’s automatic caliber 9S27, which can also be wound by hand. The manufacturer lists 28,800 vibrations per hour (eight beats per second), 35 jewels, and approximately 50 hours of power reserve.
Rank #2
- See-through case back
- Date display
- Screw-down crown
- 40mm Diameter
- Weight 178.0 g
Grand Seiko gives a static accuracy specification of +8 to −3 seconds per day. It describes this as a factory test specification, not a guarantee that a watch will keep that rate in everyday wear. The Japanese model pages separately list a worn accuracy range of +10 to −5 seconds per day; the two figures describe different conditions and should not be treated as interchangeable.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Prices and availability depend on region and date
| Price | Context |
|---|---|
| €11,300 | Approximate European recommended retail price at the 2019 launch, according to Grand Seiko |
| A$16,500 | Australian recommended retail price reported by Time+Tide Watches on October 6, 2019; a historical launch-era figure |
| ¥1,529,000 (STGK011); ¥1,551,000 (STGK013) | Prices displayed on Grand Seiko’s Japanese model pages, accessed October 8, 2026; Japan-specific, not a quote for other markets |
These figures are not directly comparable current offers: the euro and Australian-dollar amounts are historical launch prices, while the yen amounts are displayed on Japanese model pages. The available information does not establish global current availability, production status, or live inventory. For a current local price and availability, contact an authorized retailer. When considering a resale watch, verify the exact reference and dial, condition, completeness, seller, and service history.
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Quick Recap
Best Value
- RICH GOLD DIAL: this men's automatic watch features a patterned brown and gold dial with gloss finish inspired by the Half and Half cocktail
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement with a power reserve of 41 hours, includes manual winding capability
- STAINLESS STEEL GOLD FINISH: features a durable stainless steel watch case and bracelet with luxurious gold finish and see-through caseback
- WATER-RESISTANT: these men's wrist watches are water-resistant down to 50 meters
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
Rank #4
- OPEN-APERTURE DIAL: this men's automatic watch features a black dial with 24-hour subdial and LumiBrite hands, with a retro watch feel inspired by the 1964 Crown Chronograph
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable stainless steel watch case, black bezel, and stainless steel watch band
- WATER-RESISTANT: these men's wrist watches are water-resistant down to 50 meters
- 4R39 CALIBER: equipped with the reliable caliber 4R39 automatic movement, this accurate men's watch keeps precise time
Rank #3
- BURGUNDY DIAL: this men's automatic watch features a burgundy deep, pressed pattern with a gloss finish and rose gold stainless steel watch case
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL & LEATHER: features a durable rose gold-finish stainless steel watch case paired with a brown leather watch band
- WATER-RESISTANT: these men's wrist watches are water-resistant down to 50 meters
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
Sources
- Grand Seiko’s September 26, 2019 launch announcement
- Grand Seiko Japan STGK011 model page
- Grand Seiko Japan STGK013 model page
- Time+Tide Watches’ October 6, 2019 report
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
