{"product_id":"seiko-sbgn027-sport-collection-quartz-gmt-swiss-movement-stainless-steel-water-resistant-elegant-design","title":"SEIKO SBGN027 Sport Collection Quartz GMT Swiss Movement Stainless Steel Water Resistant Elegant Design","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 difference 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 not compromised. 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 black dial with a radiating pattern and the white GMT hand add a sophisticated impression to the wearer.\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. In a workshop nurtured by rich nature, three movements are created.\nThe Spirit of Takumi\nThe attitude of Grand Seiko's craftsmen 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 time within the watch, they strive for high precision, visibility, and the beauty of form. Creating a true ideal watch that shines eternally across generations. The challenge of the craftsmen 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 with the craftsmanship of excellence. The multi-faceted cut indices and thick hands are designed to create beautiful expressions even as light changes with time and place, ensuring high visibility while shining brilliantly.\nSpecifications\nExterior: Stainless Steel\nGlass Material: Dual Curve 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: 151 g\nOthers:\nScrew-lock crown\n24-hour hand (dual time display function)\nCalendar-linked time difference correction function\nGrand Seiko continues to evolve, pursuing the essence of watches as timepieces to walk through life with.\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 date change calendar\n- A power source to move thick and 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 Craftsman Workshop】\nGrand Seiko is a true \"manufacture\" that handles everything in-house from movement design to development, manufacturing, assembly, adjustment, inspection, and shipping, creating watches that fuse cutting-edge technology with the highest level of craftsmanship. The \"Shinshu Time Craftsman 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 date change \"instant date change calendar\"】\nThe 9F quartz employs an \"instant date change cam\" that works in conjunction with the \"date change gear,\" and an \"instant date change lever\" that operates with that movement. As the \"date change gear\" rotates, it gradually bends the spring of the \"instant date change lever\" to store energy, and when the cam reaches a certain position, the spring is instantaneously released, causing the date display to change instantly. While instantaneous date change calendars have been seen in mechanical watches, Grand Seiko was the first to implement this in quartz watches. The task of aligning this change to midnight is done manually by skilled assembly artisans, ensuring that the calendar does not change before it points to midnight, set as a standard between midnight and 5 minutes.\n【\"Slow-fast switch\" for precision adjustment even in quartz】\nMechanical watches have mechanisms for fine-tuning accuracy, but generally, quartz watches cannot be finely adjusted even when the case back is opened. However, the 9F quartz features a \"slow-fast switch\" that allows for precision adjustment. 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 individuality, it becomes a watch that can accompany you longer. However, the quartz crystal oscillators used in the 9F quartz are of the highest quality, having undergone special testing and aging, so the need for the \"slow-fast switch\" is rare. This is one of Grand Seiko's thoughtful considerations.\n【Thick and heavy hands accurately keep time with the \"twin pulse control motor\"】\nIn quartz watches, which generally have weaker torque than mechanical watches, it is not possible to move thick and heavy hands, so thin hour and minute hands are typically used. However, Grand Seiko's quartz models feature thick and bold hands, reminiscent of the first Grand Seiko. To accurately move 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 savings 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 ultra-low power temperature compensation. 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. Furthermore, 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【\"Crystal oscillator\" aged for three months】\nThe reason the 9F quartz can achieve high precision within ±10 seconds per year is that it uses only crystal oscillators that have been selected after three months of aging, ensuring stable performance. The crystal 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 crystal oscillators, and some may fail to maintain stable frequencies due to environmental changes or aging. Additionally, even crystal oscillators that were initially accurate may experience frequency changes over the years of customer use, leading to gains or losses. Focusing on this point, Grand Seiko was the first in the world to adopt an \"aging\" method that allows for the installation of oscillators only after they have stabilized. The aging process, which involves applying a constant voltage and artificially providing voltage during selection, lasts for three months. Only crystal 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 Curve 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 (Adjust)\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 difference 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":47586197274708,"sku":"SBGN027","price":408788.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0284\/7401\/5828\/files\/SBGN027_2.jpg?v=1787850645","url":"https:\/\/www.ippojapanwatch.com\/products\/seiko-sbgn027-sport-collection-quartz-gmt-swiss-movement-stainless-steel-water-resistant-elegant-design","provider":"IPPO JAPAN WATCH ","version":"1.0","type":"link"}