Thanks for the replies. I have learned that, as Del said, it is a livery button but it is rare to see one with two houses of nobility on it. Maybe it was a unification through marriage. I also learned that the way to tell it is a livery button is buy the six links found below the symbol. It is called a Torse and here is what I was told about it:
"The key ID-clue for this button is the presence of a Heraldry device known as a Torse, located underneath the Family Crest. A Torse is a wreath, but viewed "on edge" (as if it was laying flat on the ground below the Crest), instead of the usual standing-up view of a wreath. A Torse always has 6 furls."