I have found and digitalised a list of Porsche partners (workshops, Porsche Centres, etc) for 1982-83 in (then) West Germany.
I have noticed that for each specific model (924, 944, 911, 911 Cabrio, 928 S) there are hand writing additions. I am wondering whether this identified a sort of focal point for each of them. Any thoughts?

Thanks

Full list is available here.