Four Key features of Spring Drive
The precision, reliability and durability of Spring Drive were made possible by advances in four key areas of luxury watchmaking.
Source of energy
Developed by SEIKO especially for Spring Drive, the Tri-synchro regulator
1. Controls the mainspring's mechanical energy.
2. Converts a small part of this energy into electricity to power the quartz crystal.
3. Generates a magnetic force to regulate the speed of the glide wheel.
These three diverse forms of energy gives the regulator the 'tri' in its name.
Seiko developed a new high-elasticity alloy "Spron 510" for the mainspring. SPRON 510* is Seiko's unique alloy and leads the industry and delivers extended power and accuracy.
The Magic Lever
Magic Lever is a unique winding system first developed by Seiko in 1959. In SPRING DRIVE a new Magic Lever winding system fitted directly to the shaft of the rotor gives greater efficiency and allows a shorter winding period and a longer power reserve.
Spring Drive Chronograph
Seiko Spring Drive provides the perfect platform for a luxury chronograph, because elapsed time is measured precisely and not to the nearest fraction. With one-second-a-day accuracy, with its 12 hours duration, with its vertical clutch and column wheel for precise button operation, this is one of the world's great chronographs. Assembled by hand, with 416 parts, 50 jewels, 140 oil points and 5 different lubricants, the Spring Drive chronograph has a power reserve of 72 hours, even when the chronograph is in use
Glide motion hand
The Tri-synchro regulator
The chronograph second hand moves in glide motion and measures up to twelve hours. It stops precisely when the button is pressed, not at the nearest second or 1/10th of a second.
The Spring Drive Chronograph is the only watch that can measure with precision the natural and continuous flow of time.
Vertical clutch & Column wheel
The vertical clutch delivers high precision to the chronograph operation, and the chronograph second hand never jumps when it starts. This allows a level of accuracy (one second per day) that far exceeds that of any other luxury chronograph.
The Spring Drive chronograph is equipped with a column wheel for maximum stability in the switching mechanism. This eight-pillar component controls the chronograph function with error-free precision, and creates maximum durability and reliability.
The Tri-synchro regulator
The precision and accuracy in chronograph measurement is secured by the two-step push button system. A slight resistance at the halfway point and the reassuringly solid 'click' ensure the operator captures the precise moment to start or stop the chronograph