I have had lots of them , picked up mostly 25 + years ago , most of mine came from old dealerships so know that they are originals . The size of the one in this article , on ones a few inches larger that have reflective letters on porcelain , the small V/8 , both English & French and the tall 2 piece (7') V/8 do not have any manufacturers marking on them . These are all from Canadian dealerships . It seems that the markings must be mainly on U.S. manufactured Ford signs !
Cheers Stew .