So I yanked a set of Stronglight TSs off a Peugeot Corse last week and cleaned them up. Of course they look good and of course the inner chainring's sharktoothed. One of the other mechs had the Campy 3-pin crans right there in hand and I compared BCDs; they match, which is nice. Poking around on eBay I find that Nervar used 2 different BCDs, 120 and 122. Not a whole lot of information around on what rings interchange with 3-pin.

Any specialists out there with some ability to shed light on the situation? Are there any cool old Williams rings out there that might fit?

thanks,
Blight