It will remain the one and the only one.
I don't like to see a perpetual calendar in a Datograph.
These are two iconic watches which can be fusionned, to borrow a well known concept.
As for the latest one, I just don't like it: The big rotor is a no go for me, and the organization of the dial leaves me cold.
But the Langematik Anniversary! Wow, what a watch!
Best,
Nicolas