I’ll venture to guess as the productions of the E3/E9, 2002 were winding down in the mid 70’s, Petri still had a decent inventory of of the fabled BMW drilled wheels. With the introduction of the VW Scirocco around this same period, Petri adroitly offered VW this same wheel for the scirocco’s sport models. But then again, I could be completely off base. :confused:Yes Bert, I also don't think there is such a thing as a Scirocco Petri and an E9 Petri (unless one has a record of what car the wheel was originally on). The E9 hub is different of course, but for the wheel itself; spokes, foam grip, stamping is identical. So it's hard to distinguish/basically impossible what car the actual Petri wheel came off unless owner has the historic knowledge. Also the 'VW' Petri wheel was quite rare because came on Scirocco Mk 1 S mainly, so I don't think Petri would have made a special version just for the Scirocco Mk1 S?
As pretty as the Petris are, they probably did not fit the “modern” cabin of the 3, 5, 6, and 7 series cars of the late 70’s style wise. Most the BMWs of this period started sporting rubber clad steering wheels with no exposed alloy spokes, a trend that (for better or worse) has lasted to the present day.