Here are four pinback buttons from the University of Minnesota. These are estate fresh. These are guaranteed original. Each measures 2 1/4″ in diameter.
There is one 1945, (2) 1946, and one 1947. The 1945 is a “Scuttle the Cats” pin of Minnesota versus Northwestern. The two 1946 are Nov. 9th Minnesota versus Purdue. The 1947 pin is a “Whipurdue” Minnesota versus Purdue.
These are all functional.