I was wrong about the cable guide: looking over some earlier colnagos from the 70s they also had the cable guide routing the front DR cable to the left and above the BB. and at that time, they also had cable clips to hold the brake cable to the top tube, not braze-ons.

That BB is not equipped with the classic colnago club cut-out that the 70s colnagos had, though, but two slots like my Saronni.

VJP: thanks for the links to the bulgier catalogs, i have seen those before. the Saronni i have has full colnago decals, and a fully chrome fork, and colnago cutouts in the lugs apart from the BB shell. I think mine is 1985. Is that before or after that catalog?

Currently rebuilding the wheels (first set of Ambrosio rims lasted about 200,000 km), so it's in bits at the moment (love winter riding here...NOT) but I'll grab some photos later. or you can see velospace 2743. the original fork is a bit pitted and is waiting for a good time to rechrome it, hence the cheap alternative set up. originally came with Cinelli stem and bars and DiaCompe Aero brakes and levers.