When we were at the junk yard the other day, we discovered a feature, Herbie really needed. There it was, a VW Bug from the early 1960ies with an original horn on it.
This is a six volt horn exclusively made by “Hella” in Germany for Volkswagen.
Domi removed the horn we bought once at a common automotive retailer.
Finally Herbie got his voice back! As our Bug is actually running on twelve volt, the six volt horn is much louder than normal. But this is exactly what we were looking for.