Photos provided by Ken Skaught, Medallion Estates, digitally processed by Jock Dempsey.
Grid is 1" (25mm) square behind, and 1/2" (13mm) lines below. No dimensions provided.

These are what I call type 3 advertising anvils. A stock anvil with the clien't asvertising stamped on the face. These have been made by the thousands for hundreds of companies.