Seatbelt date code tags, change in font size, when?

[KevinK]

Anyone here know WHEN the font (size) changed on the seatbelt tags? 

  Photo of an original belt from my (11A) '67 and an arbitrary '68 belt
 

   Thanks,
 
             Kevin

[Gramps69Z]

Different belts.........  Hamill made the deluxe belt and Irvin made the standard belt.

http://www.camaros.org/seatbelt.shtml

[Gramps69Z]

Irvin............. Irving

[KevinK]

Thanks for the link,  I had looked, but didn't find it.
  That answers it