Robbie I'll look and see if I have one at the house tomorrow. but looking at my Campi book I think you need the green one for Chours (unless you have a wide freewheel then you need the black the "B" settings on the parrallelgram body). was the previous owner using Synchro or friction?
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk