WatchProSite|Market|Digest

A. Lange & Söhne

Some physics, Part II...

 

But you have to realize that it takes a long time to tension the spring barrel so that it delivers a constant force, since these watches now do not have a power reserve of 39 or 45 hours, but 72 hours. This requires a completely different gear ratio of the winding mechanism, which also has to work against a higher spring tension.

  login to reply