Grand Seiko Spring Drive Chronograph SBGC003

The Grand Seiko SBGC003 Spring Drive Chronograph GMT is an example of one of the most difficult timepieces to build at Seiko's Shinshu Watch Studio, in the Nagano prefecture of Japan. The 416 part 9R86 caliber found in the SBGC003 is all constructed by hand, by only 3 craftsmen at Shinshu Watch Studio. Only capable of building 2-3 movements per day, the 9R86 contains over 50 jewels, 140 oil points, and 5 different lubricants all made in-house by Seiko. The SBGC003 also utilizes a vertical clutch and column wheel, allowing for a more precise and durable usage of the chronograph. The Grand Seiko SBGC003 Spring Drive Chronograph, once only available in Japan, is now available in the USA with gorgeous black matte lacquer dial and stainless steel case and bracelet.

Caliber:9R86

Movement: Drive system Spring Drive

Case Material:  Stainless steel

Case Back: See-through screw case back with sapphire crystal

Glass: High definition dual-curved sapphire crystal with anti-reflective coating

Bracelet: Solid stainless steel

Buckle: Stainless steel with three-fold clasp with push button release

Accuracy: ±1 second / day

Water Resistance: 10 bar

Magnetic Resistance: 4800 A/m (60 gauss)

Weight: 187g

Case Thickness: 16.1mm

Case Diameter: 43.5mm

Jewels: 50

Features

• Blue-steel center chronograph second hand, Blue-steel chronograph minute hand, Blue-steel chronograph hour hand
• Screw crown and screw buttons