The white line recoil pad goes all the way back to 1936. Pachmyar started making them late 1945 or 1946. Mershon was a former partner in pads with white line and sued him for his use of white line in his pads and advertisements. Mershon lost sad to say. In the end everyone who ended up with one of those hideous pads lost as well. I always thought white line pads went best with polyester leisure suits and polyester bell bottom pants.