Originally Posted by
botters
they are only stamped on the strut top and there are people with the correct tooling to stamp the number into a new inner wing or strut top strengthener provided you show them the logbook first
You can still tell if it's not original....
The difficulty is proving its rung I guess, but it's easy to tell if there are welds, non original paint or whatever but proving the purpose of the non originality would be difficult.
But if spending a lot of cash on an original car with supposedly original paint and panels it would take a matter of minutes to authenticate.