Found some intersting facts about MS tubing -
Multishape, special tube set developed in collaboration with Gilco Design. Each tube profile is shaped to withstand specific stresses. Designed for competition use, it requires a precise riding style, and improves frame response to sudden shocks.
Cyclex Steel - Weight: 1930 g
From the sounds of the above I'd say you have a very special bike, made especially for racing. I've never heard of this tubing nor ever seen it - until now! You got it for a great price to, especially considering the Campy gear on it, not to mention the rare panto'd stem, which I'm in love with.
More pics please! It's hard to appreciate the tubing form what you've shown. Thanks!
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It never gets easier, you just go faster. ~ Greg LeMond