I found these plates at an estate sale this past weekend.
I'd never heard of Skyline Chili and after doing some research, found it was a chain in Cincinatti, Ohio.Established in 1949 (as stated on the plate), it was so named for the view of the Cincinnati Skyline from the first restaurant location.
These plates commemorate Skyline's 35th anniversary. They are still in business, although the family sold out to an investment group in 1998.
I visited Cincinnati a few years ago. Had I known about Skyline, I would have made an effort to drop by for a coney.
***Update*** A tip of the Top Hat to Top Cat James for the tip-off (is that enough "tips" and "tops"?) about the Skyline Chili segment of "The Simpson's".