Hi Mike
The Caliber 1.96 is installed into another later model after the 1860 series (the 1860/2 models are still in production).
The next one is the classic TWIST Ref : 16-1888-1001 of a bigger diameter case at 41 mm with the small second-counter offset.
You could have a look in the Chopard e-catalogue:
issuu.com
I don't know if there are new plans with the Cal 1.96, if you could obtain the 1860/1 (like Robert's), it is very nice piece.
Next year is Chopard's 150th Anniversary, perhaps there might be something in the pipeline.
Kong