Same name, almost the same watch, this is a light evolution of the Master Tourbillon we all know for several years, now.
The Master Tourbillon 1st generation, released in 2006.
The case is still the same, with a diameter of 41, 5 mm.
The dial doesn't receive any major change, at the exception of a set of new Dauphine hands.
The thing which changes a bit, too, has to be found in the movement.
The subtle change is the re designed rotor, and even more subtle, the Tourbillon Cage, as you can see below:
Before:
Now:
The movement reference, Cal 978, has slightly changed, too , to enhance these subtle differences. Now, its reference is Cal 978B.
And don't forget that the Cal 978 won the Chronometry Contest organized in 2009!
Best,
Nicolas