I know, it sounds like a very stupid question. But even after some time , I couldn't find any suitable answer for this:
Why do most movements come along with a power reserve, that isn't close to a multiple of 24h?
Especially with hand wound movements, I would think that the designers try to follow a daily schedule - If I forget to wind my watch today, it would be helpful if it runs until tomorrow. But what's the advantage of having a 40h power reserve?? This means, its stops in the middle of the following night (as it usually does with my Nomos...).
Looking at the usual suspects: Peseux 7001: 42h, ETA 2801: 46h, Valjoux 7760: 42h...
Anybody an idea? I mean, if it doesn't last for 48h, even 26h are enough...?
Thanks for explaining me the reason.
Regards Nauticus (Niels)