Perfect Circle Ad and Poster Collection: Perfect Circle was a famous American brand of piston rings and a major supplier to the U.S. automotive industry through much of the 20th century. (ChatGPT)
Perfect Circle Ad and Poster Collection:
1940’s Ads and Posters:
Some interesting Perfect Circle related links:
Wikipedia article about Mahle GmbH
My other Car Accessories related material:
Car Accessories Ad and Poster Collection
Tires Ad and Poster Collection
If you have a Perfect Circle related website and would like to get it listed above, please send me an email