I have a Borden’s ice cream 18-inch neon octagon advertising wall clock. It was made by Neon Products, Inc., in the 1930’s to 1940’s, I think. I have found the exact clock without the Borden’s advertising (Elsie the Cow) on it on the internet.  I see alot of Elsie the Cow advertising clocks, but have not seen any like this one on the internet.  This hung in a drugstore in my small hometown for years.  I am trying to find out its value.