{"product_id":"seiko-sbgw287-mechanical-hand-wound-watch-stainless-steel-case-elegant-design-72-hour-power-reserve","title":"SEIKO SBGW287 Mechanical Hand-Wound Watch Stainless Steel Case Elegant Design 72-Hour Power Reserve","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 autumn on its dial\n\"Late Autumn (Boshū)\" represents the changing seasons from autumn to winter. The trees in the mountains beautifully change color as they prepare for winter. The gradual deepening of the colors of the trees is expressed in a rich wine red. The slim form, equipped with the hand-wound movement Cal. 9S64, meticulously crafted by artisans at the Grand Seiko Studio in Shizukuishi, creates a clean look around the wrist. This model embodies 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 attitude of Grand Seiko's artisans who endlessly pursue the essence of time. This is akin to the way of \"Do\" 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-changing passage of time in a watch, they strive for high precision, visibility, and aesthetic beauty. Creating a true ideal watch that shines eternally across generations. The challenge of the artisans knows no end.\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 by exceptional artisans. The multi-faceted cut indices and thick hands. The symbolic designs are created to produce beautiful expressions every time the light changes due to time or place, while maintaining high visibility and shining brilliantly.\nSpecifications\nExterior: Stainless Steel\nGlass Material: Box-shaped 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 Type: Mechanical Hand-wound\nStatic Accuracy: Average daily deviation +5 seconds to -3 seconds\nWater Resistance: Daily life water resistance\nMagnetic Resistance: Yes\nWeight: 61 g\nOthers:\nNumber of Jewels: 24 jewels\nGrand Seiko continues to evolve in pursuit of the essence of watches as a timepiece to walk through life with.\nThe Holy Land of Mechanical Watches: Shizukuishi High-end Watch Workshop\nThe \"Shizukuishi High-end Watch Workshop,\" 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, 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. Grand Seiko's mechanical watches, composed of about 200 parts, have the precision of each part significantly affecting the accuracy of the finished product. The coexistence of high-precision parts manufacturing technology and the artisan skill of assembling while adjusting to 1\/100mm units creates an environment that has given birth to numerous legendary timepieces in the history of watches.\nMechanical Watch\nThe mechanical watch, which uses a mainspring as its power source and indicates the time through the movement of hands, has inherited this drive system unchanged since its inception. This drive system utilizes the force of the unwinding mainspring to rotate gears at a constant speed, and the accuracy is adjusted by a regulating and escapement mechanism composed of the \"balance,\" \"anchor,\" and \"escape wheel.\" The \"anchor\" controls the rotation of the \"escape wheel\" 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.\nThe Pillar Supporting Accuracy: The Balance Wheel\nThe \"balance wheel,\" which is the wheel 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 affects the accuracy of the watch, with weight adjustments made in units of 0.000001g to stabilize the rotation. Being a very 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.\nHigh Precision Standards Exceeding Chronometer\nThe first Grand Seiko, born in 1960, had the word \"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.\n17-Day Certification Test\nThe 9S mechanical must undergo a rigorous certification test based on strict standards lasting 17 days. Under various conditions set at three temperature levels and six directional positions, it cannot bear the Grand Seiko crown unless the advance or delay (daily deviation) falls within the standard values.\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 Type\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 Type\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 bezel, SS body, SS + sapphire glass 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-shaped 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 deviation +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;\"\u003e2022 Volume 1, Number of Jewels: 24 jewels, 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 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":47586197209172,"sku":"SBGW287","price":536399.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0284\/7401\/5828\/files\/SBGW287_2.jpg?v=1787850645","url":"https:\/\/www.ippojapanwatch.com\/ja\/products\/seiko-sbgw287-mechanical-hand-wound-watch-stainless-steel-case-elegant-design-72-hour-power-reserve","provider":"IPPO JAPAN WATCH ","version":"1.0","type":"link"}