Judging by the quantities that pop out of the injection moulding machines, it's probably one or other of the mid-range Bavaria models, the 34 maybe. And our friends at Bennytoe seem to have sold a lot of 411s.
The world's best selling boat ever was/is the Catalina 22 with 15,000 built and sold. It is still in production as the somewhat modified Catalina 23. It was built and sold in the UK as the Jaguar 22.