That is a cool Detroit Chevrolet license plate frame (especially since I live an hour north of Detroit). Just an FYI, Mack and Gratiot are streets in Detroit which intersect, which was probably the location of the long-gone Chevrolet dealership that your frame is from. It is literally about 500 feet from the Faygo soda plant. Faygo is a Michigan made local favorite, not sure how many states they export to.
There is also a building with numerous layers of advertising painted on the side. One layer of paint looks like “Chevrolet”, because it starts with a ‘C’ and has a ‘let’ at the end, it might have said something else, because there is another ‘L’ right after the ‘let’ but the font is definitely correct. Who knows, it could’ve been the advertisement from your dealership!
I've been meaning to post my pair of 748's since the first of the month but kept forgetting to look up the pictures I had of them. These were two of the first pumps I ever restored. We used to have a local DX station service and fuel up all of our company vehicles back in the early seventies and they were still using a pair of these Eries then. They finally replaced them with newer style pumps but I always remember using these. This pair is now on loan to our new local museum here in Monett, MO. I found the nos pump plates for them and the globes were a couple of ones that got me started with the globe habit too. Rob, yours is the first one besides mine that I've seen with the window frame bezels polished. I remember that being several hours of the buffer and elbow grease to get them shining but it sure looks great....GB