Murphy 6330 Chair

I am really not looking for an appraisal, rather information on a piece.  My daughter is refinishing this chair as a 4-H project.  It came from her Great-Grandmother and believe it was part of a Vanity set purchased prior to 1950.  As we began to take the chair apart, we found the stamp/sticker of "Murphy 6330".  Any information would be appreciated!  Thanks!!