Home / Buy Luxury and Branded Watches: Skeies Best Watches for Men! / Grand Seiko Heritage Collection "Tsuyu" Mid-Size Manual Wind — Ref. SBGW311
Studio product photograph of the mid-sized Grand Seiko SBGW311 "Tsuyu" Heritage watch, showcasing its 36.5mm stainless steel 44GS case, an organic grayish-green "Mt. Iwate" ridge-patterned dial, razor-sharp silver indexes, and a matching steel link bracelet.
Silver watch with a greenish face on a scenic background of mountains and greenery
Silver watch with a dark green face on a wrist, wearing gray pants.
Silver watch with a dark face on a reflective surface
Detailed close-up perspective view of the Grand Seiko SBGW311 dial face, highlighting the dense, radiating ridges of the signature Mt. Iwate texture in its unique rainy-season olive green color, contrasted by high-polish diamond-cut hands and index markers.
Grand Seiko watch mechanism on a white background
Studio product photograph of the mid-sized Grand Seiko SBGW311 "Tsuyu" Heritage watch, showcasing its 36.5mm stainless steel 44GS case, an organic grayish-green "Mt. Iwate" ridge-patterned dial, razor-sharp silver indexes, and a matching steel link bracelet.
Silver watch with a greenish face on a scenic background of mountains and greenery
Silver watch with a dark green face on a wrist, wearing gray pants.
Silver watch with a dark face on a reflective surface
Detailed close-up perspective view of the Grand Seiko SBGW311 dial face, highlighting the dense, radiating ridges of the signature Mt. Iwate texture in its unique rainy-season olive green color, contrasted by high-polish diamond-cut hands and index markers.
Grand Seiko watch mechanism on a white background
Authorized Grand Seiko Retailer

Grand Seiko Heritage Collection "Tsuyu" Mid-Size Manual Wind — Ref. SBGW311

$5,900.00
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The Lush Green of the Tsuyu Rainy Season

The defining feature of this U.S. Exclusive timepiece is its breathtaking, textured dial inspired by Tsuyu—the early summer rainy season in northern Japan. The rain brings life to the dense forests and fertile rice fields that surround Mt. Iwate, the majestic peak visible right outside the windows of the Grand Seiko Studio Shizukuishi. Captured in an incredibly unique, organic green hue that carries subtle gray and iridescent undertones, the famous "Mt. Iwate" ridge-patterned dial shifts color dynamically from a deep forest shade to a bright verdant tone depending on how the light catches it.

Perfect Mid-Size Proportions of the 44GS Case

The SBGW311 masterfully balances historic legacy with modern comfort by presenting the iconic 1967 44GS case geometry in a refined, downsized execution. Measuring a highly wearable 36.5mm in diameter and a slim 11.6mm in thickness, this model completely rethinks mid-century elegance for the contemporary collector. The multi-faceted stainless steel case relies on sweeping, hand-applied Zaratsu mirror-polished planes that meet sharply with flawless hairline brushed surfaces, creating the dramatic play of light and shadow that defines the "Grand Seiko Style."

The Mechanical Intimacy of the Caliber 9S64

To maintain its compact, wrist-hugging profile, the watch is driven by Grand Seiko's in-house Caliber 9S64, a precise, high-performance manual-winding movement. Hand-assembled and tested rigorously in six separate positions, this caliber offers an accuracy rating of +5 to -3 seconds per day when static. Because it utilizes a single, highly uniform mainspring, it guarantees a robust 72-hour (3-day) power reserve, letting you set it aside for the weekend without missing a beat while enjoying the intentional, tactile ritual of winding your watch by hand.

We offer complimentary shipping on all orders, with each piece carefully packaged and fully insured for delivery. For full details on shipping methods and timelines, please visit our Shipping Policy.

Articles may be returned for a refund or exchange within 30 days of purchase, provided they are in salable condition and accompanied by a valid sales receipt. Please note that some exclusions may apply. For complete return guidelines, visit our Returns Policy.

The Lush Green of the Tsuyu Rainy Season

The defining feature of this U.S. Exclusive timepiece is its breathtaking, textured dial inspired by Tsuyu—the early summer rainy season in northern Japan. The rain brings life to the dense forests and fertile rice fields that surround Mt. Iwate, the majestic peak visible right outside the windows of the Grand Seiko Studio Shizukuishi. Captured in an incredibly unique, organic green hue that carries subtle gray and iridescent undertones, the famous "Mt. Iwate" ridge-patterned dial shifts color dynamically from a deep forest shade to a bright verdant tone depending on how the light catches it.

Perfect Mid-Size Proportions of the 44GS Case

The SBGW311 masterfully balances historic legacy with modern comfort by presenting the iconic 1967 44GS case geometry in a refined, downsized execution. Measuring a highly wearable 36.5mm in diameter and a slim 11.6mm in thickness, this model completely rethinks mid-century elegance for the contemporary collector. The multi-faceted stainless steel case relies on sweeping, hand-applied Zaratsu mirror-polished planes that meet sharply with flawless hairline brushed surfaces, creating the dramatic play of light and shadow that defines the "Grand Seiko Style."

The Mechanical Intimacy of the Caliber 9S64

To maintain its compact, wrist-hugging profile, the watch is driven by Grand Seiko's in-house Caliber 9S64, a precise, high-performance manual-winding movement. Hand-assembled and tested rigorously in six separate positions, this caliber offers an accuracy rating of +5 to -3 seconds per day when static. Because it utilizes a single, highly uniform mainspring, it guarantees a robust 72-hour (3-day) power reserve, letting you set it aside for the weekend without missing a beat while enjoying the intentional, tactile ritual of winding your watch by hand.

We offer complimentary shipping on all orders, with each piece carefully packaged and fully insured for delivery. For full details on shipping methods and timelines, please visit our Shipping Policy.

Articles may be returned for a refund or exchange within 30 days of purchase, provided they are in salable condition and accompanied by a valid sales receipt. Please note that some exclusions may apply. For complete return guidelines, visit our Returns Policy.

From the

HERITAGE

Collection

US Exclusive
Silver watch with a greenish face on a scenic background of mountains and greenery

The Lush Green of the Tsuyu Rainy Season

The defining feature of this U.S. Exclusive timepiece is its breathtaking, textured dial inspired by Tsuyu—the early summer rainy season in northern Japan. The rain brings life to the dense forests and fertile rice fields that surround Mt. Iwate, the majestic peak visible right outside the windows of the Grand Seiko Studio Shizukuishi. Captured in an incredibly unique, organic green hue that carries subtle gray and iridescent undertones, the famous "Mt. Iwate" ridge-patterned dial shifts color dynamically from a deep forest shade to a bright verdant tone depending on how the light catches it.

Perfect Mid-Size Proportions of the 44GS Case

The SBGW311 masterfully balances historic legacy with modern comfort by presenting the iconic 1967 44GS case geometry in a refined, downsized execution. Measuring a highly wearable 36.5mm in diameter and a slim 11.6mm in thickness, this model completely rethinks mid-century elegance for the contemporary collector. The multi-faceted stainless steel case relies on sweeping, hand-applied Zaratsu mirror-polished planes that meet sharply with flawless hairline brushed surfaces, creating the dramatic play of light and shadow that defines the "Grand Seiko Style."

The Mechanical Intimacy of the Caliber 9S64

To maintain its compact, wrist-hugging profile, the watch is driven by Grand Seiko's in-house Caliber 9S64, a precise, high-performance manual-winding movement. Hand-assembled and tested rigorously in six separate positions, this caliber offers an accuracy rating of +5 to -3 seconds per day when static. Because it utilizes a single, highly uniform mainspring, it guarantees a robust 72-hour (3-day) power reserve, letting you set it aside for the weekend without missing a beat while enjoying the intentional, tactile ritual of winding your watch by hand.

Movement

  • Caliber: 9S64
  • Power Source: Manual winding
  • Jewels: 24
  • Accuracy: +5 to -3 seconds per day (when static)
  • Duration: 72 Hours

Case

  • Case Material: Stainless steel
  • Case Diameter: 36.5mm
  • Case Thickness: 11.6mm
  • Case Length: 42.7mm
  • Lug Width: 18mm
  • Crown: Push crown
  • Strap/Bracelet: Stainless steel bracelet with three-fold clasp with push button release
  • Crystal: Box shaped sapphire crystal
  • Caseback: Stainless steel case back with lion emblem
  • Special: US Exclusive

Functions

  • Features: Time
  • Water Resistance: 100m
  • Magnetic Resistance: 4,800 A/m
Silver watch with a greenish face on a scenic background of mountains and greenery

The Lush Green of the Tsuyu Rainy Season

The defining feature of this U.S. Exclusive timepiece is its breathtaking, textured dial inspired by Tsuyu—the early summer rainy season in northern Japan. The rain brings life to the dense forests and fertile rice fields that surround Mt. Iwate, the majestic peak visible right outside the windows of the Grand Seiko Studio Shizukuishi. Captured in an incredibly unique, organic green hue that carries subtle gray and iridescent undertones, the famous "Mt. Iwate" ridge-patterned dial shifts color dynamically from a deep forest shade to a bright verdant tone depending on how the light catches it.

Perfect Mid-Size Proportions of the 44GS Case

The SBGW311 masterfully balances historic legacy with modern comfort by presenting the iconic 1967 44GS case geometry in a refined, downsized execution. Measuring a highly wearable 36.5mm in diameter and a slim 11.6mm in thickness, this model completely rethinks mid-century elegance for the contemporary collector. The multi-faceted stainless steel case relies on sweeping, hand-applied Zaratsu mirror-polished planes that meet sharply with flawless hairline brushed surfaces, creating the dramatic play of light and shadow that defines the "Grand Seiko Style."

The Mechanical Intimacy of the Caliber 9S64

To maintain its compact, wrist-hugging profile, the watch is driven by Grand Seiko's in-house Caliber 9S64, a precise, high-performance manual-winding movement. Hand-assembled and tested rigorously in six separate positions, this caliber offers an accuracy rating of +5 to -3 seconds per day when static. Because it utilizes a single, highly uniform mainspring, it guarantees a robust 72-hour (3-day) power reserve, letting you set it aside for the weekend without missing a beat while enjoying the intentional, tactile ritual of winding your watch by hand.

Movement

  • Caliber: 9S64
  • Power Source: Manual winding
  • Jewels: 24
  • Accuracy: +5 to -3 seconds per day (when static)
  • Duration: 72 Hours

Case

  • Case Material: Stainless steel
  • Case Diameter: 36.5mm
  • Case Thickness: 11.6mm
  • Case Length: 42.7mm
  • Lug Width: 18mm
  • Crown: Push crown
  • Strap/Bracelet: Stainless steel bracelet with three-fold clasp with push button release
  • Crystal: Box shaped sapphire crystal
  • Caseback: Stainless steel case back with lion emblem
  • Special: US Exclusive

Functions

  • Features: Time
  • Water Resistance: 100m
  • Magnetic Resistance: 4,800 A/m

Why Choose Skeie's

Authorized Dealer
Official Grand Seiko authorized dealer with full manufacturer warranty and authenticity guarantee
Expert Service
Over 100 years of horological expertise with certified watchmakers and personalized customer care
Fast & Secure Shipping
Insured delivery with tracking, carefully packaged to arrive in perfect condition

Every new Grand Seiko purchased at Skeie's is backed by their 5-year warranty

5
YEAR
WARRANTY
Click here to view Grand Seiko's warranty policy

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THE SKEIES EXPERIENCE

Frequently Asked Questions

We take all jewelry and watches in for review and estimation before beginning any work; the review is complimentary and we will always approve estimates with you before we begin any work.

We cannot give price estimates over the phone or online, as every piece can var

We have a team of expert goldsmiths and jewelers on site, and can work on a large range of repair needs.

Common repairs include ring sizing, polishing, rhodium plating, adjusting chain length, replacing clasps, re-stringing services, and more.

There is no appointment necessary to drop off your items for review and estimates.

Since we're located in Eugene, Oregon, we do NOT charge sales tax. The prices you see are the prices you pay!

We offer free shipping on all orders. Our standard shipping is 2-7 days; all items are fully insured and require a signature upon delivery.

Articles are accepted for credit or exchange in the U.S. if returned in salable condition within 30 days, accompanied by a sales receipt. Some exclusions may apply.