Hello! I asked a Bob about your question. Here what he say: Alas the Vintage BMW Museum collection doe not yet contain a R17, R66 or R51S but there are many other rare machines including a mostly original 1925 R32 and a 1943 R75. At this very moment I am chasing a rare factory/private racer from 1948 - a year that they were not supposed to be building anything larger than 250 cc’s. This one has been hiding in a garage for over 30 years and is a bit of late 1939 R51, some war era R75 and some hand built parts that BMW added to start competing privately. As for what you might want to share I would offer this - “one of the very few private BMW collections that is very accessible to the public which contains mostly all original BMW’s from every decade from the 1920’s up to today.” Thanks for watching my video 😃