Classed as Very Fine. Original shank.
I'm unsure why Harold labeled this as such. I couldn't find it in Johnson's "Uniform Buttons" either. More research.
Mr. Hodder states that this is a Mourning button with funeral urn.
An issue of "Just Buttons" March 1965 had an article "18th Century Copper Button" which stated that its identity was unknown, but matched the wall paper at a certain Society. There are five known specimens.