The Pro Tour from the 1970's to about 1980 had the brazed on centerpull brakes, which work outstandingly well. Only the later ones had the chromed lugs, but I hadn't realized the entire frame was chromed. I have a 1977 that I restored this winter/spring coming here to Albuquerque in a shipping container this weekend, and I can't wait to ride it here.
I don't think this bike is a very common one. It makes me really want some other Centurions from this era.