Here we have a very nice Mavic chainset, 170mm, 50/41/32, Campag and Mavic rings. I guess from the 1980s?? It was on a bike I bought and have replaced it with a biopace (don't laugh....). Some minor rubs but otherwise excellent. I understand it was professionally converted to triple rather than a factory build. Outer rings I believe are 144BCD. All threads are good. £50 or offers. Now £40 posted