I just purchased a Campagnolo Valentino front derailleur form a cyclist in LA for the whopping sum of $5.00. I saw on Chuck Schmidt's web page that that model rear came out in 1964 then he states later that the group was introduced in 67. It has the old logo on the cage that moves the chain it is the old pushrod type non pivoting It has a steel clamp that has Campagnolo embossed the only marking I can find is a number 3 I can email someone a photo if they can help me? Sam DiBartolomeo