Spring Drive is Seiko’s exclusive movement that achieves an unprecedented level of accuracy (+/- 15 seconds per month on average, equivalent to +/- 1 second per day) by regulating a spring-driven watch with state-of-the-art electronic technology that functions without batteries or other external power source.

One of its unique features is a true continuously sweeping second hand, instead of the traditional beats per time unit as seen with traditional mechanical and most quartz watches. (Wikipedia)

Spring Drive uses a mainspring, barrel, automatic winder and stem winding like in a mechanical watch to store the watch energy. The conventional escapement is replaced with a device that Seiko calls a Tri-synchro Regulator to regulate the unwinding of the mainspring. The regulator controls the use of the three forms of energy used in the Spring Drive mechanism; the mechanical power of the mainspring, the electrical energy generated from this mechanical power, and the electromagnetic energy that governs the rotation of the glide wheel.

SBGA211grandseiko-SBGA211 SBGC223grandseiko-SBGC223

GRAND SEIKO SBGA125
Limited
GRAND SEIKO SBGA125

Specifications

Case
Case High-intensity titanium Case back: High-intensity titanium and sapphire crystal
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Case size Diameter 40mm×Thickness 12.8mm
Band High-intensity titanium
 
Movement
Movement Caliber 9R65    Instructions
Driving system Spring Drive
Power reserve Approximately 72 hours
Accuracy ±1 seconds per day (±15 seconds per month)
 
Functions/Specifications
Clasp Three-fold clasp with push button release
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Remarks Screw down crown Screw back See-through back Jewels: 30 Power reserve display function
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GRAND SEIKO SBGC205
GRAND SEIKO SBGC205

Specifications

Case
Case High-intensity titanium case Case back: high-intensity titanium and sapphire crystal
Glass Dual-curved sapphire crystal glass
Coating Anti-reflection coating on inner surface
Case size Diameter 43.5mm×Thickness 16.1mm
The perimeter of bracelet 200.0mm
 
Movement
Movement Caliber 9R86 Instruction
Power reserve Approximately 72 hours (3 days)
 
Functions/Specifications
Water resistance 10 bar water resistance
Magnetic resistance Magnetic resistance
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GRAND SEIKO SBGC203
GRAND SEIKO SBGC203

Specifications

Case
Case Stainless steel case Case back: stainless steel and sapphire crystal
Glass Dual-curved sapphire crystal glass
Coating Anti-reflection coating on inner surface
Case size Diameter 43.5mm×Thickness 16.1mm
The perimeter of bracelet 201.0mm
 
Movement
Movement Caliber 9R86 Instruction
Power reserve Approximately 72 hours (3 days)
 
Functions/Specifications
Water resistance 10 bar water resistance
Magnetic resistance Magnetic resistance
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GRAND SEIKO SBGD202
GRAND SEIKO SBGD202

Specifications

Case
Case 18K rose gold Case back: 18K rose gold and sapphire crystal
Glass Box-shaped sapphire crystal
Coating Anti-reflection coating on inner surface
Lumi Brite -
Case size Diameter 43.0mm×Thickness 13.2mm
The perimeter of bracelet 195.0mm
Band Crocodile
 
Movement
Movement Caliber 9R01 
Driving system Spring Drive
Power reserve Approximately 192 hours
Accuracy ±0.5 second per day (±10 seconds per month)
 
Functions/Specifications
Clasp Three-fold clasp with push button release
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 150.0 g
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GRAND SEIKO SBGA211
GRAND SEIKO SBGA211

Specifications

Case
Case High-intensity titanium Case back: High-intensity titanium and sapphire crystal
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Case size Diameter 41.0mm×Thickness 12.5mm
The perimeter of bracelet 193.0mm
Band High-intensity titanium
 
Movement
Movement Caliber 9R65    Instructions
Driving system Spring Drive
Power reserve Approximately 72 hours
Accuracy ±1 seconds per day (±15 seconds per month)
 
Functions/Specifications
Clasp Three-fold clasp with push button release
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 100.0 g
Remarks Screw down crown Screw back See-through back Anti-metal allergy Jewels: 30 Power reserve display function
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GRAND SEIKO SBGC223
GRAND SEIKO SBGC223

Specifications

Case
Case High-intensity titanium and ceramic
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Case size Diameter 46.4mm×Thickness 16.2mm
The perimeter of bracelet 190.0mm
Band High-intensity titanium and ceramic
 
Movement
Movement Caliber 9R86    Instructions 
Driving system Spring Drive
Power reserve Approximately 72 hours
Accuracy ±1 seconds per day (±15 seconds per month)
 
Functions/Specifications
Clasp Three-fold clasp with push button release
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 158.0 g
Remarks Screw down crown Screw back See-through back Dual time function with 24-hour display Stop watch Power reserve display function Quick correction function of time difference adjusting to a calender Caseback with a lion emblem Jewel:50 Anti-metal allergy
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GRAND SEIKO SBGE011G
-10%
GRAND SEIKO SBGE011G

Specifications

REF. SBGE011
Driving system Spring Drive
Caliber No. 9R66
Case Stainless steel Case back: Stainless steel and sapphire crystal
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Crasp Three-fold clasp with push button release
Accuracy ±1 per day (±15 seconds per month)
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 158.0 g
Case size Diameter 41.0mm  Thickness 13.8mm
Remarks ・Screw down crown ・Screw back ・See-through back ・Jewels: 30 ・Dual time function with 24-hour display ・Power reserve display function ・Quick correction function of time difference adjusting to a calender ・Power reserve: Over 72 hoursIn an actual product, the case back direction might be different from the photograph.
 
Rp 63,800,000 Add to cart
GRAND SEIKO SBGE005G
-10%
GRAND SEIKO SBGE005G

Specifications

REF. SBGE005
Driving system Spring Drive
Caliber No. 9R66
Case Stainless steel Case back: Stainless steel and sapphire crystal
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Crasp Three-fold clasp with push button release
Accuracy ±1 per day (±15 seconds per month)
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 157.0 g
Case size Diameter 41.0mm  Thickness 13.8mm
Remarks ・Screw down crown ・Screw back ・See-through back ・Jewels: 30 ・Dual time function with 24-hour display ・Power reserve display function ・Quick correction function of time difference adjusting to a calender ・Power reserve: Over 72 hoursIn an actual product, the case back direction might be different from the photograph.
Rp 63,800,000 Add to cart
GRAND SEIKO SBGE001G
-10%
GRAND SEIKO SBGE001G

Specifications

REF. SBGE001
Driving system Spring Drive
Caliber No. 9R66
Case Stainless steel
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Crasp Three-fold clasp with push button release
Lumibright Hand and index
Accuracy ±1 per day (±15 seconds per month)
Water resistance 20 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 177.0 g
Case size Diameter 44.0mm  Thickness 14.7mm
Remarks ・Rotating basel (24hour display) ・Screw down crown ・Screw back ・Jewels: 30 ・Dual time function with 24-hour display ・Power reserve display function ・Quick correction function of time difference adjusting to a calender ・Power reserve: Over 72 hoursIn an actual product, the case back direction might be different from the photograph.
Rp 69,600,000 Add to cart
GRAND SEIKO SBGC005G
-10%
GRAND SEIKO SBGC005G

Specifications

REF. SBGC005
Driving system Spring Drive
Caliber No. 9R86
Case High-intensity titanium Case back: High-intensity titanium and sapphire crystal
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Crasp Three-fold clasp with push button release
Accuracy ±1 per day (±15 seconds per month)
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 124.0 g
Case size Diameter 43.5mm  Thickness 16.1mm
Remarks ・Screw down crown ・Screw back ・See-through back ・Dual time function with 24-hour display ・Stop watch ・Power reserve display function ・Quick correction function of time difference adjusting to a calender ・Power reserve: Over 72 hoursIn an actual product, the case back direction might be different from the photograph.
Rp 113,200,000 Add to cart
GRAND SEIKO SBGC003G
-10%
GRAND SEIKO SBGC003G

Specifications

REF. SBGC003
Driving system Spring Drive
Caliber No. 9R86
Case Stainless steel Case back: Stainless steel and sapphire crystal
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Crasp Three-fold clasp with push button release
Accuracy ±1 per day (±15 seconds per month)
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 187.0 g
Case size Diameter 43.5mm  Thickness 16.1mm
Remarks ・Screw down crown ・Screw back ・See-through back ・Dual time function with 24-hour display ・Stop watch ・Power reserve display function ・Quick correction function of time difference adjusting to a calender ・Power reserve: Over 72 hoursIn an actual product, the case back direction might be different from the photograph.
Rp 95,800,000 Add to cart
GRAND SEIKO SBGC001G
-10%
GRAND SEIKO SBGC001G

Specifications

REF. SBGC001
Driving system Spring Drive
Caliber No. 9R86
Case Stainless steel Case back: Stainless steel and sapphire crystal
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Crasp Three-fold clasp with push button release
Accuracy ±1 per day (±15 seconds per month)
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 187.0 g
Case size Diameter 43.5mm  Thickness 16.1mm
Remarks ・Screw down crown ・Screw back ・See-through back ・Dual time function with 24-hour display ・Stop watch ・Power reserve display function ・Quick correction function of time difference adjusting to a calender ・Power reserve: Over 72 hoursIn an actual product, the case back direction might be different from the photograph.
Rp 95,800,000 Add to cart