These are a matching pair of 12-string tuner castings. They've been drilled out for the tuners and the screw holes have been tapped, as have the fixing holes underneath. A few years back I bought a lot of spare parts from the son of a luthier who had died. I've already disposed of many of them.
I have no idea how much they would be worth. If you have notions of building yourself a D12 you would either have to have a machine shop or have them made privately somewhere. If you're interested, make me an offer. My email address is afbrookes@aol.com.
