Well, 44Ti just stopped winding

[tyler1980]

Originally Posted by PJ S

The movement is a fully integrated chronograph design – no two ways about it.
Maybe there’s confusion due to the VC Overseas’ big date, which I’d imagine is a module, due to the fact there’s a date wheel already provided for, as can be seen on the ROCs and Blancpains.
In other words, you can’t separate the chrono from the base caliber like you can with the DD on the 3120 or ETAs, etc.

It’s cheaper to design and develop a base caliber upon which modules can be added in order to be able to offer a range of models with different features, than it is to design five sole-purpose designs with identical movements, for example.
Patek does that – 5990 vs 5960. Both use the same 28-520 integrated concentric register chronograph base, but one with DT, the other with AC. Same goes for the various 240 and 324 models.

makes sense, good to know.