Great bike!! I have seen a couple of these (same livery), but not Stateside.
I agree with Juvela regarding straightening the shift lever, although levers were intentionally (?) bent (same alloy?) at the factory/by builders during the 80s for TT/aero set-ups). I have bent later version Campy levers from the late 70s-80s for certain builds without any problems. Still, I would recommend finding a replacement which is easy to find and fairly inexpensive (lever only, no hardware: $15-$30); I assume "closed C" logo ("open C" design- double the price). Front brake appears to be later version (spring retained by pins; not wrap around style) Universal Mod. 51 calipers. I cannot ID the rear caliper.
Great crankset, hard to find!!
I have no idea as to the time range that these were built; I have never researched the model. I would be interested to know what the chain stay length is to determine the frame style/geometry.
What is the seat post O.D.?
Although I have seen these I don't think I observed 100% original (sans tires) versions and it has been 3 decades so I cannot provide anything regarding what the original gruppo would have been unless it is documented in a catolog, or found on a another example purporting to be an OE set-up.
I would love a Cinelli bike of that vintage!
I would not mind having a Columbia shaft drive bike just as an oddity (back then, and even now; almost bought a modern German multi-speed shaft drive bike). I just don't think I would be happy riding it (though I have never been on one). I have lifted one up (figured about 60 lbs or more) and spun the pedals on it; not something I would want to do any climbing on (aside from the weight) even on moderate inclines with the gear ratio it used. I think is was from the 1890s to very early 1900s.