I inherited a S.S. Stewart Wondertone XX - it has the pearl headstock
& fretboard ( with flowers ), a four string, the pearl inlaid circle
on closed back ( has inlaid wood ring around the pearl ), no serial number ( no sticker stain on inside rim ), but the metal ring that holds the reasonator(sp)in has " D 28 " stamped on it.It looks alot
like the Gibson TB 11's but headstock shape is different.My dad played this when he was a kid ( he was born in 1911 )... What do I have ? You seem to be the ones to ask after endless internet searches! Any info would be GREAT ! Thanks ... Phil