Why do you think the rail-road track doesn't work? I saw this 325 in the IWC museum. It has rail-road track markings and rectangular hour markers and at least to my eyes it looks great. ...
You know, they are in the one brand one logo mindset... but we never know... GK had the similar mindset with Breitling and he changed his mind in a way...
I'm aware of the reference 5000 models. However, it would be nice to have the twin main springs, ceramic components of the Pellaton winding system and other upgrades in the newer calibres.