In 1968, Grand Seiko introduced Japan’s first automatic 10-beat watch (61GS) to the world. In 2009, 10-beat Caliber 9S85 surpassed the original, with high precision parts created using sophisticated modern technology assembled with skills with skills honed over the many decades of Grand Seiko’s watchmaking. Innovations to the precision controlling mainspring, the hairspring, and the escapement mean that the 9S Mechanical is not simply a revival of the 10-beat movement of the past, but an entirely new incarnation of this high-precision movement. In every detail, it is faithful to the ‘Grand Seiko Style’, the embodiment of the Grand Seiko design philosophy which started with the 44GS.

The black dial creates a strong impression with its ‘Mount Iwate pattern’, a delicate and beautiful radial pattern, inspired by the many-ridged contours of the Mt. Iwate, the mountain that is visible through the windows of the Shizuku-Ishi Watch Studio where Grand Seiko mechanical watches are made. The delicacy, strength and beauty of the movement can be enjoyed the exhibition case back. 

Exterior

• Case Material : Stainless steel
• Glass Material : Dual-curved sapphire
• Glass Coating : Anti-reflective coating on inner surface
• Case size : Diameter 40.2mm × Thickness 13mm
• The perimeter of Band : 195mm
• Clasp type : Three-fold clasp with push button release

Movement

• Caliber no. : 9S85 Instructions
• Movement Type : Automatic with manual winding capacity
• Power reserve : Approx. 55 hours
• Accuracy : 5 to -3 seconds per day (when static) / 8 to -1 seconds per day (normal usage accuracy)

Functions

• Water resistance : 10 bar
• Magnetic resistance : Equipped
• Weight : 151.0 g
• Other details / Features :
• ・37 jewels
• ・Case back with lion emblem
• ・Date display
• ・Screw case back
• ・Screw-down crown
• ・See-through case back
• ・Stop seconds hand function