2.75" with numerous but tiny silvering dots off and about 97% remaining. Top has celluloid covered "1909" un-circulated Indian head penny although with a hairline break at the upper left edge so that the edge of the penny took on some dark tarnish. Text reads "You'll Never Go Broke When Using/The C.G. Conn Instruments/Elkhart, Indiana." To the right side of the coin top to bottom is a very light air mark but showing little. A rarity. See other early musical instrument advertising items in our Entertainment small item section devoted to music.