Gang,It is my understanding that the appropriate clamp-on downtube shifters for an early 70's nuovo record equipped bike will feature the cable stops/guides found on some early Campy shifters. I have seen examples where the stops/guides are chromed and some where they are black (annodized? painted?). Can anyone tell me when the switch was made? And when the stops disappeared?Are the chrome examples 'right' for my '71 Super?Matthew BowneBrooklyn, New York