Congratulations Ken, that is a beautiful bike!! I love the color scheme. I wouldn't do anything to it except clean it up and ride it. I'm a little surprised to see all the french components on there. Are the wheels clinchers? Maybe someone switched out the tubulars? Also almost all Legnano's I've seen have Legnano branded cranks, made by Magistroni if they're cottered and Ofmega on the Gran Premio's if they're not. The front derailleur with the square body is also Campy Valentino, and matches the rear. As to the year based on the serial number - '71? As early as 1970 I've seen bikes with the new Legnano logo you have on yours, but not earlier. Anyway it's super cool - Devin.