This is a very unique and rather rare Gibson Trap Door Ukulele Banjo. Gibson fitted the resonator of these banjoleles with a hinged mechanism that allows the resonator to open and project sound toward the player. This is similar to many of their famed banjos and mandolins, which had a similar design. This ukulele banjo has a calf skin head held in place by a metal ring and 20 brackets. It has a  maple pot and neck with rosewood fingerboard and the ''python'' shaped headstock.