Who was making ignition insulator on valve cover
All I can tell you is that's the way it came.
I had an old timer tell me that my matching (2 wire per insulator) replacements was not correct for 67.
The 4 individuals from my car are the same color as the ones in the photo I posted (dirty white)
How about the mid wire insulators....
One is square (one wire in each corner) and one is 4 wide!