1977. A young Seiko engineer started to wonder how he could make his dream of "the ever-lasting watch" come true. In his vision: a watch wound by a mainspring and with one-second-a-day accuracy, a precision that only the finest electronic watches could deliver. This engineer, Yoshikazu Akahane, was a persistent and dedicated man. It took him 28 years, countless set-backs and over 600 prototypes, but he and his team eventually succeeded by inventing new technologies in every aspect of the watchmaker's art. In 2005, Seiko Spring Drive came of age.In 2005, Seiko Spring Drive came of age.
Spring Drive Chronograph
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
The sole motive power is the mainspring
The power of the mainspring is transmitted via gear train to the hands and to the Tri-synchro regulator.
The Tri-synchro regulator controls the speed of the glide wheel and the hands by electromagnetic braking.
Three Key Innovations
The Tri-synchro regulator
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.
*SPRON is a registered trademark of Seiko Instruments Inc.
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.
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 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 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