SEIKO SBGA437 SEIKO
SEIKO SBGA437 SEIKO
SEIKO SBGA437 SEIKO
SEIKO SBGA437 SEIKO
SEIKO SBGA437 SEIKO
SEIKO SBGA437 SEIKO
SEIKO SBGA437 SEIKO
SEIKO SBGA437 SEIKO
SEIKO SBGA437 SEIKO
SEIKO SBGA437 SEIKO

SEIKO SBGA437 Grand Seiko Heritage Collection Spring Drive Automatic 37mm Stainless Steel Sapphire Crystal Elegant

This product is in stock and available for purchase.We will send it within 3-5 working days.
Vendor: SEIKO
SKU: SBGA437
Availability: In Stock
Product Type: SEIKO
¥559,240
¥682,000
¥559,240

2% Discount on International Remittance.
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📦 Due to high demand, this item is estimated to ship in 15-30 business days after order confirmation.

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The full 1000$ Free shipping·

Warranty Policy

GRAND SEIKO – 5 Years International Warranty.

JDM Guarantee

All Products are sent from Japan, Japan licensed.

Return Service

If not used, you can return it any time within 14 days.
Description
Description
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Product Highlights
A beautiful shining "Thick Silver Radiant" dial from Grand Seiko Shinshu, where Grand Seiko's workshop is located, was once a major production area for silk. The dial, named "Thick Silver Radiant," pays homage to this manufacturing region. The glossy dial features a delicate radiant pattern that looks as if it were drawn with silk, reflecting a commitment to its roots. This intricate pattern can only be created with soft silver, achieved through a special technique applied to silver plating. The movement housed in this watch is Grand Seiko's unique Spring Drive. The second hand glides silently across the dial, a characteristic feature of the Spring Drive. The maximum power reserve lasts approximately 72 hours (about 3 days), and the remaining duration can be checked on the power reserve display located at the bottom left of the dial. Grand Seiko Manufacture Grand 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 level, cutting-edge technology is fused with the highest level of craftsmanship. Two workshops nurtured by rich nature produce three movements. The Spirit of Takumi The 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 aesthetic beauty. Creating a true ideal watch that shines eternally across generations. The challenge of the artisans knows no end. Light and Shadow The 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 exceptional craftsmanship. 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. Specifications Exterior: Stainless Steel Glass Material: Dual Curve Sapphire Coating: Anti-reflective coating on the inner surface Case Size: Width 40mm Height 46.6mm Thickness 12.3mm Wrist Size (Maximum): 203mm Clasp: One-push three-fold type Drive Type: Spring Drive Power Reserve: Approximately 72 hours (about 3 days) at maximum winding Accuracy: Average monthly difference ±15 seconds (equivalent to daily difference ±1 second) Water Resistance: Daily life water-resistant (10 ATM) Magnetic Resistance: Yes Weight: 157.0 g Others: ・Screw back ・Screw lock type crown ・Calendar (date) function ・Number of jewels: 30 ・Second hand stop function ・Power reserve display function ・Back cover with lion emblem Grand Seiko continues to pursue the essence of watches as a timepiece to walk through life with. ■ 9R Spring Drive The Spring Drive is a unique drive mechanism from Seiko that uses a mainspring, which is the power source for mechanical watches, while controlling accuracy through precise signals from a quartz crystal oscillator, which is the control system for 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 with high precision" and also as a "quartz watch that does not use batteries or motors." ◆ A Hybrid Mechanism of Mechanics and Quartz The major elements in the mechanism that makes the watch move are "power" and "control system." ・"Power" is the force that drives the watch. ・"Control system" is the mechanism that controls the movement of the watch. The Spring Drive is a hybrid movement that adopts "power: high torque" from mechanical watches and "control system: high precision through IC control" from quartz watches. "Power" is the "mainspring" used in mechanical watches. The power of the Spring Drive comes from the "mainspring" used in mechanical watches, a self-contained drive system that does not rely on batteries or motors. When the crown is wound, the mainspring is wound up, and the force trying to unwind the mainspring is transmitted to the gears, moving the hands attached to the gears. The Spring Drive can rotate the thick and heavy hands characteristic of Grand Seiko because it utilizes a high-torque mainspring (rather than a motor). The "control system" is the "Tri-Synchro Regulator." The control system of the Spring Drive is a unique speed control mechanism that uses electrical signals from the IC and quartz 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. The TRI in Tri-Synchro Regulator (TRI【3】-SYNCHRO【synchronize】 REGULATOR【speed controller】) refers to: ① Mechanical force ② Electrical signal ③ Magnetic force These three interact to create the precise movement of the second hand. 1. Mechanical force (power: mainspring) Generating electricity with the unwinding force of the mainspring. For example, a bicycle light uses the power of the rotating tire to emit light. The Spring Drive generates power using the same principle, with the rotor and coil wound stator acting as the generator. The rotor generates a small amount of electrical energy by rotating 8 times per second. 2. Electrical signal (precise signal: IC and quartz oscillator) The quartz oscillator emits a precise signal. Using a small amount of electricity, the quartz oscillator and IC are activated. When power is transmitted to the quartz oscillator, it sends a precise signal of 32,768Hz per second to the IC, equivalent to quartz. 3. Magnetic force (brake: rotor and stator) Applying a brake to the rotor to control speed. The IC compares the precise signal from the quartz 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 sequence from the rotor to the gears and hands, accurately marking the time.
Specifications
Drive Type Mechanical
Radio Wave Automatic Correction Function None
Display Type Analog
Case Bezel SS, Body SS, Back Cover SS
Glass Dual Curve Sapphire Glass
Band Material Metal
Band (Adjustable) Screw type
Accuracy Average monthly difference ±15 seconds (equivalent to daily difference ±1 second)
Specification 1 Number of jewels: 30, Power reserve display function, Second hand stop function, Calendar (date) function
Specification 2 Back cover with lion emblem, Screw back, Screw lock type crown
List Price ¥682,000 JPY
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Returned items must be unused, in the same condition that we sent it to you, and in their original packaging. Stains, folded cards, broken seals/ plastic foiling broken will not be accepted. If the condition of the product shipped back to us is not in acceptable condition we reserve the right to not refund or exchange. Products that have been personalized cannot be refunded or exchanged.

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