Pelican Parts has a fairly sizable collection of Porsche Racing posters and have kindly posted high-res scans on their site. There are several eras represented, each with their own distinct style. Really shows off how classic the Porsche logo is, it seems to work pretty much anywhere you put it. Note the various 917’s in there.
I remember seeing some similar posters up on Grain Edit a while back with a link to VP Racing where you could buy some. I always meant to pick one up, but I just checked back and pretty much all the ones I wanted are gone. Someone really needs to reprint these.
There’s an article over at the Porsche site about Eric Strenger, who designed a lot of the Porsche racing posters during these periods. Looking through his work it’s amazing how much range he had as an artist. I would never have guessed some of these were by the same person.