 
Heh folks - can anyone tell me what the original horn buttons were off  (apart from country buggies ) my  brother is chasing one for his buggy and may
help widen the search.
Cheers
Peter 
Ko200
Think the CB used a Kombi  black wheel  with plain black button    
Could be wrong   been 30 years since I looked at one
Horn buttons are off a standard beetle, also a split beetle. made by petri.