I'v an old 12" banjo that is made from folded bell brass at the top of the pot it is folded in such a way that it forms a V with the top of the V continued and closed the whole of the outside of the pot and the tension hoop is chased (not engraved)I have a calf skin head on it and it is very loud, it is also unidentified.?? The pot was found in Canada thats all I know about it.