Colnago International from I think the early to mid '80s: Columbus steel tubing and many of the original components: stem, headset, brakes, chainrings, cranks.
I put a new seat on there because I liked the juxtaposition of a new saddle with the old frame, and a Thomson seatpost because I like the look and needed something a little longer (this bike is a 54 cm and I'd probably take a 56 in these older-style frames; I have a Bridgestone RB2 56 that is more comfortable.)
I've got the original bars, but swapped them out for these Bontrager compacts with a 26mm clamp area with the Sram S500 levers to get my hands up a little because the old style was low, and my hands were even lower relative to the saddle because I'm running a longer post to adjust for the smaller frame.
Some details:
Stem and headset:
Fork crown with Ernesto Colnago signature on brake:
Seat stay (it's got the club symbol on the seat stay bridge as well):
Cutout on bottom of BB shell:
Big chain ring:
Last thing is that I took it to the shop for servicing on the bottom bracket and the spindle was like a work of art - the guy at the shop said is was made by Campagnolo
Wish I had better pics, but that is my cell phone