This distributor was created in cooperation with VW-professionals; this has resulted in a product that can be used in all VW type 1, 2 and 3 cars (Beetle, Microbus, 181 etc.).
The unit can be ordered with or without vacuum advance.
The installation instructions show a cross-reference between the original Bosch-number and the setting of the 123VW-R-V.
There is also a list, that links VW-engine-numbers with the required setting of the 123 ignition.