Otis, how do you know that your bike is '76? I have gone over the "ballpark" dating guidelines on the CR list but I thought the 75,76 bikes were the same until the shorter rear dropouts appeared.
I believe Chuck Schmidt's well-known Super dating schema shows '76 as the first year for "Colnago" along with the club in the fork crown. (It also says '76 was first year for the shorter dropouts.) I always consider there to be overlap with model years, as I don't believe the changes happened in a chronologically tidy manner. But I would tend to go with '76 for a bike with "Colnago" in the crown. In any case, the info Chuck compiled does show differences between '75 and '76 Supers.