Grand Seiko Spring Drive SBGA211 “Snowflake”
Spring Drive is a unique movement that combines mechanical and electronic watchmaking technology.
Introduction/Function SBGA211 is powered by Seiko’s unique movement Spring Drive, which combines the power of a clockwork with the precision of a quartz watch. The small hand at 7.00 on the dial indicates the power reserve. The case and bracelet are made of high-strength titanium. Scratch-resistant and corrosion-resistant surface treatment (40% lighter than stainless steel).
The movement of the movement is 9R65. Movement type: spring driven, automatic winding. Power reserve: 72 hours. Accuracy: ±1 second per day/±15 seconds per month. Case material: high-strength titanium (40% lighter than stainless steel). Glass material: sapphire. Glass coating: anti-reflective coating on the inner surface. The size of the case: diameter 41mm × thickness 12.5mm. Water resistance: 10 bar / 100 meters. top luxury copy watches
The movement is held in place by two large movement clips, which pass through the movement ring and hook into the center of the case. After removing (together with the valve stem), the movement exits from the back of the case.
The name of the model “Snowflake” is associated with the surface of the dial. The dial and name were inspired by the snow in the mountains surrounding Shinshu Watch Studio in Nagano Prefecture.
Although similar to the traditional Geneva stripes, the decoration of the rotor and bridge surfaces are different. Conventionally, each strip is developed by using sandpaper/impregnated rubber blocks or the like to remove material from the surface of the part by a sanding process. Here, a sharp diamond cutter set at an angle rotates in a circular motion to cut off the surface. The final beauty is “Grand Seiko” as opposed to any other brand and becomes part of the brand’s decorative DNA.
The automatic winding system (developed by Seiko Co., Ltd. in 1959) has been effective and winds the mainspring when the rotor swings in two directions while pushing and pulling the transmission wheel through the “magic lever”.
The copy Spring driver was developed in about 20 years. The goal is to develop an accurate timepiece that combines the precision of quartz with the life of a mechanical movement. The fusion of the two watchmaking worlds produces a unique concept with a smooth sliding second hand.
