I have 3 older BMWs: 1973 3.0cs, 1986 634CSi, 1994 840i. I have original documentation on the 840i but nothing for the earlier cars. Does BMW offer a document like the Jaguar Heritage Certificate or Porsche Certificate of Authenticity for its older cars? I can't find anything on the CCA website.
I've no idea - good question for BMW customer service. Might also try the BMW CCCA - http://www.bmwccca.com/about-us.html