Here's a rare one. 1967 (I think) Ampeg B-15ND. The B-15 you've come to love and cherish BUT this also has the factory extension cabinet. It's evident that this is truly an extension cabinet . The flip top has never had a head attached nor could it. The flip top is removed from the extension cabinet inverted and attached to the bottom of the top cabinet in place of the dolly board. Then the top cabinet is latched to the bottom cabinet. It's much simpler than it sounds. The head works just great and has no issues. Come and get it. I ain't shipping it. I can take tons of pics for you.