Some tips about correct and wrong ignition coils for VW air cooled (boxer engine) 1300, 1500 and 1600. Some are still using distributor with contact breaker ("platinum") and condenser and many have electronic ignition. 

Igniton COIL only for VW 1300, 1500 and 1600 with distributor + contact breaker & condenser

Igniton COIL only for VW 1300, 1500 and 1600 with distributor + contact breaker & condenser

Ignition coil correct for VW with electronic ignition 

Ignition coil correct for VW with electronic ignition