Any pics of the seat cluster? Do you know what the seat post diameter would be? That would help.

It has some similarities to a 1960-ish Bianchi Competizione frame I have, but I don't that's a march, because the Comps had pressed-in headset races in the head tube, and this one doesn't. Also, the fork crown doesn't match up. The rest of the lugwork looks very similar, though.

My best guess is that it is from the late 1950s to early 1960s and is either a top-of-the-line frame or close to it. The lug work looks to be in line with that guesstimate. But the braze-ons that are there (especially the cable housing stops for the bottom bracket area and the pump pegs under the top tube) and the ones that are not say "before the late 1960's" to me.

Now will come the posts form more knowledgeable folks who will disabuse me of my ignorance.

In any event, it looks like a keeper, something well worth some effort to clean up.