turn signal
 

any body know if a 68 switch will work on a 1970 911?

The PET manual (1970>>1973) from the Classic Porsche parts website has the combination left side steering column switch for years 71 and 72 as p/n911-613-301-30.

It does not call out a p/n for 1970 or 1973.

The Classic Porsche parts website does not provide a parts manual for 1968.

If you have schematics for the 1968 and 1970/71 models compare the wiring and pin out to see if they are the same. Some parts have been common over many early model years. My 80SC has an different p/n common to the SC’s.