This document that the seller offers very interesting to me. It appears there are two 18- numbers. The second one at the bottom starts with BB.
If you need something higher resolution snoop around at the auction listing here and click the photo in question.
https://www.hemmings.com/auction/193...2#&gid=1&pid=3
Are any members able and willing to translate some of this to English if it's enlightening?
