The manufacturers of factory built diners marked their product with builders tags, just like the badge on a car or a kitchen appliance. I’ll be adding more as I go through my photo archives, but if you have any variants or builders from your travels or collections that you’d like to share, I’d love to see them!
Diner Hunter
Diner Hunter 
Clock = AWESOME!
Jeez! New Jersey seems to have been the home O’ Diner cars/buildings and stuff!
Jersey was the place to be. And Jerry- I’m fortunate enough to be able to say that the first Paramount clock in the post is mine!