I linked to an e-bay Hasko, and I have to say, there are many similarities, but also some differences, albeit minor.

The brake bridge is identical, as is the BB hole and BB lug cutout. The Colnago club is missing on the top of the DT lug, just like the OP's, which I believe all true Colnago's have. Chainstays look identical to. Differences - the fork crown has Hasko stamped on it instead of the clubs. This one also has a chrome fork, but that could a difference in the years they were built.

Is this paint original? I've never seen a Colnago in that color.

Here's the Hasko - http://www.ebay.com/itm/Colnago-Hask...item27d10a349e