These photos are of three different staff cars used by Hitler (one also used by Himmler) as displayed in the Sinsheim Technical Museum. The museum has literally hundreds of vintage motorcars, from rare Ferarri's, to early Bugattis, to more Maybach's than perhaps anyplace else in the world. I enjoyed seeing the Zeppelin Maybachs in particular, powered with same model engines that were used in the Graf Zeppelin. I'll do a separate tour of the Maybachs and link to it when it's ready.
The three-axle grey staff car is also pictured near the end of this show in a vintage Real Photo Postcard (RPPC). This is one of many in the Hoffmann photo series of Hitler's victory lap through Poland in September 1939. These postcards typically come with Karl Hennig addresses and are relatively easy to find.
The black armored staff car is also pictured at the end of this slideshow in two private photographs taken by someone who attended a Party Day / Reichsparteitag rally -- these are just two of several dozen black and white photographs of the event we picked up a while back.