Vintage Seiko Kinetic watches.
Kinetic is Seiko's own solution to the one nuisance of a quartz watch, the battery. The oscillating weight of an automatic drives a small generator, the current it makes charges a cell inside the case, and that cell runs a quartz movement. You wear it, it powers itself, and nothing is thrown away every few years. We hold only a handful at a time, and each one is charged and run on the bench before it is listed.
Frequently asked questions
Does a Seiko Kinetic need a battery?
No. A Kinetic charges itself from the motion of your wrist and stores that energy in a capacitor or rechargeable cell, so there is no disposable battery to replace every few years. The storage cell can wear out over a long life, but it is a serviceable part rather than routine maintenance.
What happens if I do not wear a Kinetic watch for a while?
It runs down and stops, exactly as an automatic would. Shake it for a minute or two and it starts again, then reset the time. How long a full charge lasts depends on the movement and the condition of the cell, which is why we run every one before listing rather than quoting a figure.
Is a Seiko Kinetic the same as an automatic?
No, though it borrows half of one. The oscillating weight is the same idea, but it turns a generator instead of winding a mainspring, and the time is kept by a quartz oscillator rather than an escapement. Expect quartz accuracy and quartz maintenance, with the wearing habits of an automatic.
Is a Kinetic as accurate as a normal quartz watch?
It is a quartz watch, so yes. The timekeeping comes from a quartz oscillator, the same as any battery-powered watch, and you should expect accuracy measured in seconds a month. The Kinetic part of the design changes only where the power comes from, not how the time is kept.
