{"product_id":"seiko-sbgn029-sport-collection-quartz-gmt-watch-elegant-design-durable-stainless-steel-high-precision-movement","title":"SEIKO SBGN029 Sport Collection Quartz GMT Watch - Elegant Design - Durable Stainless Steel - High Precision Movement -","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 compact GMT model equipped with specifications suitable for a sports watch. It features the \"Caliber 9F86,\" developed with the aim of achieving the ultimate quartz, making it a model that offers a genuine sports design while also feeling smart. With the \"time zone correction function,\" you can adjust the hour hand without stopping the watch when aligning with the time in a different time zone, ensuring that the high accuracy of the quartz watch is maintained. The case, primarily featuring a hairline finish, the 24-hour display metal bezel, and the simple three-row band create a sense of hardness, while the screw-lock crown maintains high airtightness and water resistance, providing durability that can withstand tough use. The prominent GMT hand and the two-tone dial ring create a contrast that stands out against the glossy navy dial, allowing for intuitive differentiation between day and night indicated by the GMT hand.\nGrand Seiko\nManufacture\nGrand Seiko is a true manufacture that handles everything in-house, from movement development to design, manufacturing, assembly, adjustment, inspection, and 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. In a workshop nurtured by rich nature, three movements are created.\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 within a watch, they strive for high precision, visibility, and the beauty of form. Creating a truly 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, distortion-free flat surfaces and straight lines. The mirror finish is meticulously polished with the exceptional skills of artisans. The multi-faceted cut indices and thick hands are designed to create beautiful expressions even as light changes with time and place, shining brilliantly while maintaining high visibility.\nSpecifications\nExterior: Stainless Steel\nGlass Material: Dual Curved Sapphire\nCoating: Anti-reflective coating on the inner surface\nLumiBrite: Yes (hands and indices)\nCase Size: Width 39.0mm Height 45.9mm Thickness 12.3mm\nWrist Size (Maximum): 203mm\nClasp: One-push three-fold type\nDrive Type: Analog Quartz\nAccuracy: ±10 seconds per year\nWater Resistance: Daily life reinforced water resistance (20 ATM)\nMagnetic Resistance: Yes\nWeight: 151g\nOthers:\nScrew-lock crown\n24-hour hand (dual time display function)\nCalendar-linked time zone correction function\nGrand Seiko continues to pursue the essence of watches as a companion for life and evolves.\n■ 9F Quartz\n【The ultimate quartz movement equipped with numerous innovations that transcend conventional wisdom in pursuit of the essence of wristwatches】\nAccurately keeping time, easy to read, and a companion for life. The 9F quartz is the result of questioning the essence of wristwatches that seems so obvious.\n- Instantaneous switching moment calendar\n- A power source to drive thick, bold hands like a mechanical watch\n- Improved accuracy in indicating seconds correctly\n- High airtight structure to enhance oil retention\nIncorporating numerous innovations that were unthinkable in conventional quartz, the 9F quartz overturns the previous notion of \"thin and light quartz\" and boasts world-class performance.\n【The birthplace of quartz watches and Spring Drive\nShinshu Time Artisan Workshop】\nGrand Seiko is a true \"manufacture\" that handles everything from movement design to development, manufacturing, assembly, adjustment, inspection, and shipping in-house, merging cutting-edge technology with the highest level of craftsmanship. The \"Shinshu Time Artisan Workshop,\" responsible for Grand Seiko's quartz watches and Spring Drive, is located in Shiojiri, Nagano Prefecture. In just five years since the introduction of Grand Seiko's quartz, they completed the world's highest-level quartz that surpassed previous quartz norms while also creating the dream mechanism Spring Drive, developed over more than 20 years, showcasing innovative ideas and manufacturing techniques.\n【Instantaneous switching \"moment calendar\"】\nThe 9F quartz employs a \"moment calendar cam\" that works in conjunction with the \"day wheel,\" and a \"moment calendar lever\" that operates with its movement. As the \"day wheel\" rotates, it gradually bends the spring of the \"moment calendar lever\" to store energy, and when the cam reaches a certain position, the spring is instantaneously released, causing the date display to switch instantly. While instantaneous switching calendars have been seen in mechanical watches, Grand Seiko is the first to implement this in quartz watches. The task of aligning this switching moment with midnight is done by skilled assembly artisans, ensuring that the calendar does not switch before it points to midnight, set as a reference between midnight and 5 minutes.\n【Precision adjustment possible even in quartz\n\"Regulator Switch\"】\nWhile mechanical watches have mechanisms for fine-tuning accuracy, generally quartz watches do not allow for such adjustments even when the case back is opened. However, the 9F quartz features a \"regulator switch\" that allows for precision adjustments. After using the watch for several years, when tendencies of gaining or losing time become apparent, this switch can be used to correct the accuracy. By understanding the \"quirks\" of the watch over many years of use and making adjustments tailored to its personality, it becomes a watch that can accompany you longer. However, the quartz crystal oscillator used in the 9F quartz is of the highest quality, having undergone special testing and aging, so the need for the \"regulator switch\" is rare. This is one of Grand Seiko's thoughtful considerations.\n【Thick, heavy hands accurately keep time\n\"Twin Pulse Control Motor\"】\nIn quartz watches, which generally have weaker torque than mechanical watches, it is not possible to move thick, heavy hands, so typically thin hour and minute hands are used. However, Grand Seiko's quartz models feature thick, bold hands reminiscent of the first Grand Seiko. To accurately drive such hands, the 9F quartz is equipped with a \"twin pulse control motor\" that can move heavy hands while saving energy. While the second hand of a typical quartz moves in one step per second, the 9F quartz moves in two steps per second. This is because it efficiently sends two signals per second to achieve high driving power and energy efficiency to turn thicker hands. Of course, this two-step movement is not perceivable to the naked eye and appears as a single step like conventional quartz watches.\nAdditionally, unlike other quartz watches, it employs a unique method of temperature compensation using ultra-low power. Typically, quartz watches do not have temperature compensation programs for monthly accuracy. Moreover, if a temperature compensation program is included, it requires significant power for control, which shortens battery life. To address this issue, the 9F quartz adopts ultra-low power temperature compensation. By driving the unique \"twin pulse control system\" while reducing power consumption of the IC, it achieves approximately twice the driving power of conventional systems and a longer battery life of about three years compared to typical quartz watches.\n【3 months of aging for\n\"Quartz Oscillator\"】\nThe high precision of the 9F quartz, achieving an annual difference of ±10 seconds, is made possible by using only quartz oscillators that have been selected after three months of aging for stable performance. The quartz oscillator vibrates 32,768 times per second, and the accuracy of quartz watches is determined by whether this frequency can be maintained. There are individual differences in quartz oscillators, and some may fail to maintain stable frequencies due to environmental changes or aging. Additionally, even if a quartz oscillator initially has high accuracy, its frequency may change over years of use, leading to gains or losses in time. Focusing on this point, Grand Seiko was the first in the world to adopt an \"aging\" method that ensures the frequency stabilizes before installation. The aging process, which involves applying a constant voltage and artificially providing voltage during selection, lasts for three months. Only quartz oscillators that pass this standard are installed in the 9F quartz.\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;\"\u003eBattery\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 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 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;\"\u003eDual Curved 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;\"\u003eMetal\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;\"\u003eScrew type\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;\"\u003e±10 seconds per year\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;\"\u003e24-hour hand (dual time display function), calendar-linked time zone correction function, calendar (date) function included\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, screw back, screw-lock crown\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 45.85mm × Width 39mm × Thickness 12.34mm\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¥506,000 JPY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n```","brand":"SEIKO","offers":[{"title":"Default Title","offer_id":47586197307476,"sku":"SBGN029","price":408816.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0284\/7401\/5828\/files\/SBGN029_2.jpg?v=1787850647","url":"https:\/\/www.ippojapanwatch.com\/products\/seiko-sbgn029-sport-collection-quartz-gmt-watch-elegant-design-durable-stainless-steel-high-precision-movement","provider":"IPPO JAPAN WATCH ","version":"1.0","type":"link"}