Picked this up a few weeks ago for a whopping 20 bux...

Full Tange MTB double butted tubing, and a very interesting BB/chainstay. Much like a wishbone or monostay. Uses rollercam or U-Brakes on the rear rather than regular cantilevers.
Short c-stays (16.25") and super compact rear triangle, 23" sloping top tube should fit me well.

Nice Spinner brand cromoly fork.

I'm guessing early to mid 90's era and planning to build with some eccentric Suntour parts I have laying around. Anybody remember Ergotec shifters? Like a mix between gripshift and rapidfire plus with some funky integrated brake levers.

Head badge reads Montagna Innovation, downtube reads Montagna, and seat tube reads Sommita. Google translate puts Montagna Sommita in Italain as meaning Mountain Top. Doubt its Italian, but what do I know?

Can anybody ID this frame or give me any information at all?