Hi Fiddle,
Bruno is a company that shared some of it's works with the Martin name before Martin established it's own factory. I have found many nice old guitars bearing the Bruno name.
In later years the Bruno name was one of the first at importing their instruments from the orient.
If your banjo has any embossings indicating " Bruno, New York", you indeed have a fine instrument, but it might be an import.
Takamine made a limited edition parlor guitars bearing the Bruno name which is a commemortive instrument and sought out by many because of it's size and limited availability.That was an 80's era event and I haven't heard anything else about the Bruno.
E-bay has offered several items such as mando banjos, banjo-ukes etc.
Mudjack