A. Lange & Söhne

What's the mainspring power reserve in each case below and why???!!! 😉 ...  

I don’t know honestly but will be curious to know.

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You're on the right track, just have to look a little more closely!

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(B) is full because the longer tooth of the center wheel is locked with the shallower slot of the outer wheel, so it cannot be wound further (during winding, the outer wheel rotates clockwise relative to the center wheel). Stopworks is preventing overwind...  

Very interesting thread. Thanks.

the center wheel can further unwind one full revolution before the longer tooth engages with the shallower slot. (Note that unwinding takes place via clockwise rotation of the center wheel relative to the outer wheel). HOWEVER, in case of Zeitwerk, the mo...  

I just had the photos (previously) confirmed by others and the fact that the Zeitwerk never fully unwinds; plus it is interesting to know that it is by one revolution. Many thanks and congratulations on owning this wonderful watch.

I tried but failed to figure it out. I never noticed that one tooth was longer and one gap was shallower. I need to look at the movement under magnification while I wind it -- something to look forward to!

The differences are so minor they all look the same!

Thanks for the education. And great watch of course.

For showing us, I love learning about movements and what makes them special and unique.