You'll loose about a pound +, I'd guess. The crank arms above are all the same. The chainrings for the Super are lighter than the regular Record rings. "Nuovo" as far as the crank area was concerned, was the bottom bracket... The Nuovo cups had spiral grooves to help keep dirt out; regular Record (earlier) didn't. Super Record bottom brackets are really light, with Ti spindle & aluminum cups, but also somewhat rare & costly. For durability, I say go with good-used Nuovo Record BB (you'll need Italian threads & matching 70mm spindle), and an older Record crankset. They'll be period to your frame, save you weight, and last quite a while.