You are absolutely right, the oil may be thinned or completely dissolved by the spray (or so is my concern too). I'm just hoping that there is some oily component that prevents the complete loss of lubricant...again, just hoping. As far as the electronic components including coils, it should not harm them at all...otherwise, why advertise it as "quartz movement cleaner"! But again, who knows...My thoughts too, it is to send the watch to an accutron expert. In any case, I wish you much success whatever you decide to do!
Cheers,
Bob