I have a ssstewart Phil'a stamped number 68926--5 string banjo with 11 and qtr inch wide base and about 20 inch neck . 5th string stops at about 14-15 in up neck while other 4 strings continue to end with what appears to be mother of pearl inlay and design --neck has star and diamond inlay same mop .I can make out date plate july 17 91 or 94 im not quite sure. banjo in very good condition was won in card game by grandfather when traveled out west and played in carolina mts when he returned.any idea what value maybe , who to contact to find out appraised value and history. thank you for any assistance... zach