Wiper motor for M21 RR 71?

[torbsim]

Hi everyone, I'm wondering whether my 1971 M21 RR has a 2-speed or 3-speed wiper motor?

The documentation doesn't provide any information, and the body manual says 2 in some places and 3 in others.

I think the 3 stands for Satellite Premium models, but I'm not sure.

What does your experience tell you?

Thanks
Ben