CAMPAGNOLO "Record" Front Gear Changer . Produced, apparently, for just one year, 1978. This is the one with four holes on the outer chain guide. The last two photos are of the SHOW BIKE it was fitted to.

Color: Silver
Material: Alloy, Aluminum, Aluminum Alloy
Set Includes: Derailleur (Front)
Mounting Type: Clamp-on
Cable Pull Type: Bottom Pull
Brand: Campagnolo
Model: Campagnolo Record
Compatible Bike Type: Racing Bike, Road Bike
Number of Chainrings: Double
Country/Region of Manufacture: Italy
Number of Items: 1
Part Type: Front Derailleur