It's a Campy Sport crank from the early seventies. The aluminum alloy version was the Gran Sport. TA three pin chainrings will fit and go down to 36 teeth. There was also a TA adaptor that alowed the big six pin TA rings (sometimes falsly called Criterium) to work with this crank. I put a Sport with a TA adaptor and 50,45 rings on my Heron. It looks cool, and there's lots of room between the spider arms to get in and clean around the bottom bracket.
Leonard Bulger Ann Arbor, MI Hot and Humid
Wornoutguy wrote:
Steel crank chromed with a standard BB press fit not cottered, no marking on the back -- has an engraved Campagnolo shield on the front -- 3 arm with 2 aluminum chainrings the largest bolts to the three arm with a 104mm as close as I can measure and the smaller is riveted onto the outer, Can anyone identify this for me. Thanks Sam D.