Motobecane or Peugeot pulley. Weighs less than the one you probably have. It also has eleven teeth on the Peugeot style sprocket.
Designed with Peugeot in mind. These fit 16mm pedal shafts and the width of the mounting area is 43mm wide. We've heard av88 might not mount up right so please be sure to measure first!
Watch your fingers on these! Some of these have been reported to have a sharp edge.