{"product_id":"seiko-sbgw285-mechanical-hand-wound-grand-seiko-elegant-design-stainless-steel-case-sapphire-crystal","title":"SEIKO SBGW285 Mechanical Hand-Wound Grand Seiko Elegant Design Stainless Steel Case Sapphire Crystal","description":"```html\n\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"font-weight:800;padding:8px;background:#d9d9d9;\"\u003eProduct Highlights\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"padding:8px;\"\u003eA model that embodies the beauty of late summer on its dial\n\"Byouka\" represents the transition from summer to autumn. It reflects the end of summer as felt by artisans. The calm coloring evokes the time when dew begins to fall on morning flowers, and the wind feels cool against the skin. This model captures the beautiful transition of the seasons in Japan on your wrist.\nGrand Seiko\nManufacture\nGrand Seiko is a true manufacture that handles everything in-house from movement development, design, manufacturing, assembly, adjustment, inspection, to shipping. In an environment where each component can be researched and developed from the material, cutting-edge technology is fused with the highest level of craftsmanship.\nThe Spirit of Takumi\nThe artisans of Grand Seiko continue to endlessly pursue the essence of time. This attitude is akin to the \"way\" seen in traditional Japanese martial arts, tea ceremony, and flower arrangement. By honing their skills and deepening their spirituality, this path becomes sharper and opens up new realms. To embody the ever-flowing time within a watch, they strive for high precision, visibility, and aesthetic beauty. Creating a truly ideal watch that shines eternally across generations is a challenge without end for the artisans.\nLight and Shadow\nThe Japanese delicately perceive, savor, and cherish the countless expressions created by light and shadow as time flows. The design is characterized by sharp, flat surfaces and straight lines without distortion. The mirror finish is meticulously polished with exceptional craftsmanship. The multi-faceted cut indices and thick hands are designed to create beautiful expressions every time the light changes, maintaining high visibility while shining brilliantly.\nSpecifications\nExterior: Stainless Steel, Case Back: Stainless Steel and Sapphire Glass\nGlass Material: Box-type Sapphire\nCoating: Anti-reflective coating on the inner surface\nLumibrite: None\nCase Size: Width 37.3mm, Height 44.3mm, Thickness 11.7mm\nWrist Size (Maximum): 195mm\nDrive Method: Mechanical, Manual Wind\nPower Reserve: Approximately 72 hours (about 3 days) when fully wound\nWater Resistance: Daily life water resistance\nMagnetic Resistance: Yes\nWeight: 61.0 g\nOthers:\n- See-through case back\n- 6-screw fixed case back\n- Number of jewels: 24\n- Second hand stop function\n- Case back with lion emblem\nGrand Seiko continues to pursue the essence of watches as timepieces to walk through life with.\n【The Holy Land of Mechanical Watches: Shizukuishi Premium Watch Studio】\nThe \"Shizukuishi Premium Watch Studio,\" which is responsible for Grand Seiko's mechanical watches, is located in Shizukuishi Town, Iwate Prefecture. It is a manufacture that consistently handles everything from the design and manufacturing of components such as the hairspring and gears that govern the heart of mechanical watches, to assembly, adjustment, inspection, and shipping. Many skilled craftsmen, including those who have received the \"Modern Master\" and \"Yellow Ribbon Medal,\" are present, and their exceptional craftsmanship produces the world's highest quality mechanical watches.\nGrand Seiko's mechanical watches consist of approximately 200 parts, and the precision of each part greatly influences the accuracy of the finished product. The coexistence of high-precision parts manufacturing technology and the artisan skill to assemble them with adjustments down to 1\/100mm creates an environment that has given birth to numerous legendary timepieces in watch history.\nMechanical watches, which use a mainspring as their power source and indicate time through the movement of hands, have inherited this drive method unchanged since their inception. This drive system utilizes the force of the unwinding mainspring to rotate gears at a constant speed, and the escapement mechanism, composed of the \"balance,\" \"anchor,\" and \"gear,\" adjusts the accuracy. The \"anchor\" controls the rotation of the \"gear\" at a constant rhythm based on the regular vibrations of the \"balance.\" The \"balance\" repeats a pendulum-like regular back-and-forth motion, controlling the speed at which the mainspring unwinds to be constant (i.e., regulating) and allowing it to unwind over a long period. This constant motion is transmitted to the hour, minute, and second hands, displaying the time.\n◆ The Pillar Supporting Accuracy: \"Balance Wheel\"\nThe \"balance wheel,\" which is the part of the balance, regulates and controls the repetitive motion of the anchor, maintaining a constant speed of vibration. It is one of the crucial parts that significantly influences the accuracy of the watch, with weight adjustments made in units of 0.000001g to stabilize rotation. Being an extremely delicate part, slight temperature changes can cause contraction or expansion, leading to deformation. Therefore, in the 9S mechanical, the number of support pillars is increased from the usual 2-3 to 4, providing solid support and minimizing the impact of temperature differences on the shape of the balance wheel and, consequently, on accuracy. They are aware that this increases the labor involved in making the parts significantly, but they are committed to preventing deformation.\n◆ High Precision Standards Exceeding Chronometer\nThe first Grand Seiko, born in 1960, had \"Chronometer\" engraved on the dial as proof of passing the Swiss chronometer standards. However, you will not find the word \"Chronometer\" on today's Grand Seiko. The reason lies in the \"New GS Standards.\" Established in 1998, this standard has a higher precision criterion than the Swiss chronometer standards. There exists a \"Grand Seiko Special (GSS) standard\" that exceeds the \"New GS Standards\" in the 9S mechanical. This precision standard can only be reached by skilled watchmakers who spend many times more time than usual on mechanical watches, resulting in very few being produced each year.\n◆ 17-Day Certification Test\nThe 9S mechanical must undergo a unique certification test based on strict standards lasting 17 days. Under various conditions set at three temperature levels and six positional differences, if the advance or delay of time (daily difference) does not fall within the standard values, it cannot bear the Grand Seiko crown.\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"font-weight:800;padding:8px;background:#d9d9d9;\"\u003eSpecifications\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eDrive Method\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eMechanical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eRadio Wave Automatic Correction Function\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eDisplay Method\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eAnalog\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eCase\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eSS on the edge, SS on the body, SS + Sapphire Glass on the case back\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eGlass\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eBox-type Sapphire Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eBand Material\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eCrocodile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eBand (Adjustable)\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eAccuracy\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eStatic Accuracy: Average daily difference +5 seconds to -3 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eSpecification 1\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eNumber of jewels: 24, Second hand stop function\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eSpecification 2\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eCase back with lion emblem, See-through case back, 6-screw fixed case back\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eSpecification 3\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003eCase Size: Height 44.3mm × Width 37.3mm × Thickness 11.72mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border-bottom:1px solid #5d5d5d;font-weight:600;padding:6px 10px;width:35%;\"\u003eList Price\u003c\/td\u003e\n\u003ctd style=\"border-bottom:1px solid #ccc;padding:6px 10px;\"\u003e¥671,000 JPY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n```","brand":"SEIKO","offers":[{"title":"Default Title","offer_id":47586197438548,"sku":"SBGW285","price":535738.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0284\/7401\/5828\/files\/SBGW285_5.jpg?v=1787850657","url":"https:\/\/www.ippojapanwatch.com\/products\/seiko-sbgw285-mechanical-hand-wound-grand-seiko-elegant-design-stainless-steel-case-sapphire-crystal","provider":"IPPO JAPAN WATCH ","version":"1.0","type":"link"}