GRAND SEIKO - Heritage Collection - SBGR315

Product Specifications

Product Features 
A self-winding mechanical model with a case size of 40 mm that combines presence and wearability 
A long-awaited model with a case size of 40 mm is now available in the Heritage Collection equipped with the caliber 9S6 series. The simple silver dial, which evokes the identity of Grand Seiko, has enhanced legibility by suppressing radiation. The strong, three-dimensional indexes are placed well outside the calendar frame, harmonizing with the presence of the case and creating a well-proportioned, imposing face. The case design follows the standard Grand Seiko design with a sense of presence and luxury that will never grow old. The caliber 9S65 “Mechanical Automatic Winding 3 Days” lasts for approximately 3 days at maximum winding, and the latest balance spring and MEMS escapement (ankle, escapement wheel) have improved the stability of accuracy during actual use. Through the see-through back cover, the wearer can enjoy watching the mechanical movement spinning the time with great precision. This model, with its well-balanced combination of presence and wearability, as well as high legibility, will serve you for a long time as a timepiece that will mark precious moments together for a lifetime.

Grand Seiko

Manufacture 
Grand Seiko is a true manufacture that handles everything from movement development to design, manufacturing, assembly, adjustment, inspection, and shipping. In an environment where every single component can be researched and developed from the raw materials, we combine cutting-edge technology with the highest level of craftsmanship. Grand Seiko Studio Shizukuishi overlooking the majestic Mt. Shinshu Toki no Takumi Studio is surrounded by the mountains and lakes of Shinshu. Three movements are produced at these two studios, both of which are surrounded by the rich natural environment.

The Spirit of Takumi 
Grand Seiko's masters continue to endlessly pursue the essence of time. This is similar to the “way” of the ancient Japanese martial arts, tea ceremony, and flower arrangement. By refining one's skills and deepening one's spirituality, the path is further sharpened and opens up new frontiers. In order to embody the ever-changing time in a watch, we must master the art of high precision, legibility, and beauty of form. To create a true ideal watch that will shine forever beyond generations. There is no end to the challenge of our craftsmen.

Light and Shadow 
Japanese people delicately sense, savor, and love the myriad expressions of light and shadow created by the passage of time. Sharp, distortion-free planes and straight lines are the main form. The mirror surface has been elaborately polished with the skill of a master watchmaker. The multi-faceted cut indexes and bold hands. The symbolic designs are created to shine brilliantly while maintaining high legibility, creating a beautiful expression each time the light changes depending on the time and place.

Specifications
Exterior : Stainless steel Back cover : Stainless steel and sapphire glass

Glass Material :Dual-curved sapphire

Coating :Internal anti-reflective coating

Lumibrite :None

Case Size :40mm (width) x 13mm (thickness)

Wrist circumference (maximum) :195mm

Clasp :One-push three-fold closure

Driving System :Mechanical, self-winding (with manual winding)

Duration : Approx. 72 hours at maximum winding (approx. 3 days)

Accuracy :Static accuracy: Average daily difference +5 seconds to -3 seconds (Portable accuracy: Average daily difference +10 seconds to -1 second)

Water resistance :Reinforced water resistance for daily life (10 atm)

Magnetic resistance :Yes

Weight :156.0 g