Industrial engine/ airplane ???
No, sorry, that’s definitely from a Jaguar, they used Marelli as well as Lucas of course.The V12 Jag used mostly Lucas Electrical components. Lucas, the Prince of Darkness.
The above cap is likely off an Italian car, Ferrari or Maserati.
Packard and Cadillac, too.Lincon had a 12 cyl engine also
It's extremely cool !!Now thats cool!