The 123\PORSCHE-4-R-V is designed for Porsche 912 / 914 / 356

The unit offers a maximum total of 16 advance-curves to be selected by the end-user.
Please take a look in the curve table for available advance curves.

Porsche – 4 – R – V = Porsche stands for the 123ignition type
Porsche – 4 – R – V = 4 stands for the number of cylinders
Porsche – 4 – R – V = R stands for straight distributor cap 
Porsche – 4 – R – V = V stands for vacuum advance