In the Classic Chronograph system, the Chrono shares its energy from the same barrel.
Here, with this Duo Metre, there is no need for a coupling clutch for the Chronograph functions.
So, there is no interference on the rate of the watch when the Chronograph is in function.
Therefore, there is no loss of Energy for the normal time function, which is better for accuracy, reliability and longevity.of the 2 mechanisms.
Thus, there is no reduced amplitude when the Chronograph is engaged.
The interesting thing is that all the complications to come in the Duo metre will share this same specificity!
But don't ask me what complication will be housed, for the moment, only JLC knows! LOL
Best.
Nicolas