I found a few of these tokens at a local flea market. Each token is 16.5 mm in diameter. They appear in a token catalog as originating in Johnson City TN, where Pet Dairy has had a milk processing facility since 1929. I think they’re pre-WWII. The token catalog notes that there was a 25 cent and a 5 cent version, too. The 5 cent token is posted here.
Uncle Bob's Pix 