I have noticed a few brands - mostly high-end manufacture horlogerie - such as bremont (the Alt-c) that advertise their watches as having a 'calatrava' styling. It seems Patek's signature line of calatrava watches are the original creators of this style but I'm not too sure as to what it fully means. Perhaps it is the design of the unique ridging on the case.



Calatrava (watch) - Wikipedia, the free encyclopedia