Dear all,
in two extensive articles John Draneas has shad light on 904-054's actual story.
https://www.sportscarmarket.com/columns/legal-files/there-can-be-only-one
https://www.sportscarmarket.com/columns/legal-files/there-can-be-only-one-part-ii
Indeed the Allison car is a fake and was built from scratch.
The other car formerly offered by Jan B. Luehn for sale is 100% original and can be traced back all the way!