Hi all y'all, as my friends down south say --above is a quick video shot at GTE 2012 in Geneva of the Tensus watch in action. You can see the double escape wheel --the lower and upper are only out of synch by one beat of the balance, as the constant force spring is re-armed every time the balance is impulsed.
Easily one of the two or three most interesting pieces of watchmaking in the last few years, especially if you are a chronometry buff and interested in watchmaking solutions to chronometric problems which use traditional watchmaking methods, not exotic materials.
Jack