15/16" dia. w/classic early photo on bkg. w/the lightest trace of pink tone, probably once a deeper shade. This is only our second example of this button in our 46 years. Our first example came w/postcard that included membership card (w/matching photo) to be cut out; listing "Headquarters" at P.O. Box 417, Madison, TN. They also offered "Souvenir Packages" consisting of - "Song Folio, Photo Folio" as well as photos of several sizes. Other than the heavy color fade, button is Mint. Scarcer than both the RCA issued cello (see item #2857) and litho buttons.