IF the image is original and not AI-manipulated, it does not prove anything about BDM and DJ knives.
It just means that at that time a civilian version of an HJ-like knife was made for camping. It is also possible today to buy an HJ-like knife with a French fleur-de-lis in the handle instead of the HJ mark.
Incidentally, the knife next to it does not have the same scabbard as the one on the catalog page.