james_qp
3
Seiko
As the previous post states, the Spring Drive stores its power in a spring, so no capacitor issues there. The watch is also produced in, so far, comparatively small numbers implying that servicing should not be a problem - particularly given what can be assumed to be a very low failure rate.
The predecessor technology, Seiko Kinetic, does rely on capacitors. The rotor drives a transformer that stores its charge in a capacitor designed spoecifically for the purpose - I believe it uses a material that, at the molecular level, has a dimpled surface like a golf ball allowing an extremely high charge concentration.
On a seperate note the demise of Ventura really is to be lamented. Alongside Bell & Ross, Ventura were one of the very few brands that QP's design studios truly appreciated - no surprise given the involvement of font design luminaries such as Hannes Wettstein.
Concerns about mechanical driven capacitor watches. Seiko, Citizen, Ventura.
Bernard, for a quartz watch to last 10-20 years...
Seiko parts availability: 10 years
