Dear all,
I have finally found the one major drawback with the fantastic 7 day power reserve in many of the IWC watches. And it is the 7 days themselves!!
With all my other watches with the "standard" 42-50 hour power reserve I just leave the watch winders running at all times with their daily cycles which keep all of them running.
With my treasured PPC I have been turning the winder off when the power reserve is full - probably just a stupid thing to do, but a habit I have, just like letting chargeable batteries mostly run dry before re-charging them to optimize their lifetime and performance.
Well, guess what - last night my PPC had stopped for the first time since I first put it on in August!!! Catastrophe - disaster - and of course I discovered it just around midnight when it is not recommended to adjust the watch!!!!
That 7 day power reserve makes you forget how many days it was since you last wore the watch or since you last wound it :-)
Lesson to self: let the winder keep going at all times :o)