Kari,
Thanks for clarifying your point.
That leaves only Breitling, IWC, JLC, Zenith and Rolex as true chronograph manufacturers by your standard. The BP and VC use a FP calibre 1185, The GO and the GP use a DD module on their base movements, Breguet uses a Lemania 1372 and Habring2 uses a Valjoux 7733.
Personally, I have grown to care more about pusher feel, lack of stutter on start, timekeeping, reliability and finish. The Swiss industry worked for years with a non-integrated manufacturing model. I actually think that it is a great way of doing business.
Bob