1970s starmix mixer?

Hi,

I have the opportunity to get a starmix mixer for free, I just need to replace the belt.  This is a 70s era mixer from germany, NOT the current heavy duty italian planetary mixers (its bowl design is sort of like the bosch I think with the bundt pan shape).  However, before I spend time and money fixing it, I'd like to know if anyone has any experience with one and whether it kneads dough well, especially stiff wheat doughs?

thanks,

kevin