{"product_id":"seiko-sbge281-spring-drive-automatic-watch-grand-seiko-precision-elegant-design-sapphire-crystal-water-resistant","title":"SEIKO SBGE281 Spring Drive Automatic Watch - Grand Seiko Precision - Elegant Design - Sapphire Crystal - Water Resistant","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;\"\u003eThe Spring Drive GMT model features a striking midnight blue dial. The dial color is a near-black midnight blue, combined with the classic Grand Seiko design case. The Spring Drive movement is characterized by a second hand that glides smoothly across the dial, with its natural flow resembling the passage of time, achieved through IC control. The maximum power reserve duration is approximately 72 hours (about 3 days), and the remaining duration can be checked on the power reserve display at the bottom left of the dial. Grand Seiko continues to pursue the essence of watches as timepieces to accompany life, evolving over time.\n■ 9R Spring Drive\nThe Spring Drive is Seiko's unique drive mechanism that uses the mainspring, which powers mechanical watches, while controlling accuracy through the precise signals from a quartz crystal oscillator, which is the control system of quartz watches. The Spring Drive, equipped with a hybrid engine that incorporates the best features of both mechanical and quartz watches, can be described as a \"mechanical watch that achieves high precision\" and also as a \"quartz watch that does not use batteries or motors.\"\n◆ Hybrid Mechanism of Mechanical and Quartz\nThe major elements in the mechanism that makes the watch move are \"power\" and \"control system.\"\n- \"Power\" refers to the force that drives the watch.\n- \"Control system\" refers to the mechanism that controls the movement of the watch.\nThe Spring Drive is a hybrid movement that adopts the \"power: high torque\" of mechanical watches and the \"control system: high precision through IC control\" of quartz watches.\n\"Power\" is the \"mainspring\" used in mechanical watches.\nThe power of the Spring Drive comes from the \"mainspring\" used in mechanical watches, which is a self-contained drive system that does not rely on batteries or motors. When winding the crown, the mainspring is wound, and the force of the mainspring trying to unwind is transmitted to the gears, moving the hands attached to the gears. The reason the Spring Drive can rotate the thick and heavy hands characteristic of Grand Seiko is that it utilizes a high-torque mainspring (rather than a motor).\n\"Control system\" is the \"Tri-Synchro Regulator.\"\nThe control system of the Spring Drive is a unique speed control mechanism that uses the electrical signals from the IC and quartz crystal oscillator used in quartz watches. Imagine a toy powered by a mainspring. If the unwinding speed is not adjusted, the mainspring will unwind all at once, and the toy will stop. Therefore, a mechanism is needed to maintain a constant unwinding speed. The \"Tri-Synchro Regulator,\" developed for the Spring Drive, fulfills this role.\nThe TRI in Tri-Synchro Regulator (TRI【3】-SYNCHRO【synchronize】 REGULATOR【speed control device】) refers to:\n1. Mechanical force 2. Electrical signal 3. Magnetic force\nThese three interact to create the precise movement of the second hand.\n1. Mechanical force (power: mainspring)\nPower generation from the unwinding force of the mainspring. For example, a bicycle light uses the force of the spinning tire to emit light. The Spring Drive generates power using the same principle, with the rotor and coil wound in the \"stator\" serving as the generator. The rotor generates a small amount of electrical energy by rotating 8 times per second.\n2. Electrical signal (precise signal: IC and quartz crystal oscillator)\nThe quartz crystal oscillator emits a precise signal. A small amount of electricity is used to drive the quartz crystal oscillator and IC. When power is transmitted to the quartz crystal oscillator, it sends a precise signal of 32,768Hz per second to the IC, equivalent to quartz.\n3. Magnetic force (brake: rotor and stator)\nSpeed control by applying a brake to the rotor. The IC compares the precise signal from the quartz crystal oscillator with the rotor's rotation speed, intermittently applying magnetic brakes to prevent the rotor from spinning too fast, maintaining a constant speed. By keeping the rotor's rotation constant, controlled movements are transmitted in the order of rotor, gears, and hands, accurately marking the time.\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 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 (Adjustment)\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;\"\u003eAverage monthly difference ±15 seconds (equivalent to daily difference ±1 second)\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;\"\u003e30 jewels, 24-hour hand (dual time display function), power reserve display function, calendar-linked time difference correction function, second hand stop 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: 46.57mm (height) × 40mm (width) × 13.54mm (thickness)\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¥737,000 JPY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n```","brand":"SEIKO","offers":[{"title":"Default Title","offer_id":47586196488276,"sku":"SBGE281","price":706991.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0284\/7401\/5828\/files\/SBGE281_2.jpg?v=1787850593","url":"https:\/\/www.ippojapanwatch.com\/products\/seiko-sbge281-spring-drive-automatic-watch-grand-seiko-precision-elegant-design-sapphire-crystal-water-resistant","provider":"IPPO JAPAN WATCH ","version":"1.0","type":"link"}