Beautiful. A tad small for me, but I'm tempted to bid. Those are the best preserved and apparently best clear-coated Italian decals I have ever seen from that period -- the seat tube palmares, and the headtube club in particular.... no chance this bike has ever been repainted? (Actually, I guess the seller doesn't state anywhere that the paint is original.)
Additionally, I would have thought that a 72 would have had a clover cut-out in the top head-lug, along with two small dots either side of the fork crown. All of that may well be answered simply by referring to Colnago's famous inconsistency.