name this mystery colnago?

[fatallightning]

sort of cheap on cl by me, know the frame? the lack of any chrome detailing on the lugs or stays makes me think its entry level fare.
http://images.craigslist.org/3na3ka3m75T05P75R5a1q2b692b18596e1a15.jpg

http://images.craigslist.org/3n33p53l85Tf5Pf5R2a1qf425075797001f85.jpg

http://images.craigslist.org/3n23p53l45O25P45R3a1q4bc0ddfeaa4312f0.jpg

[old_school]

Do you know the tubing?
It is hard to tell by the small pics on my laptop, but it looks like a Mexico to me.