Found this listed on ebay just yesterday and I am not quite sure about it. No label, cracks on the top, bridge is lifting, bad pics of serial number, even the pic of the front of the headstock seems a little off almost like the veneer has been replaced and the a non-guild truss rod cover was put on. But still I'm interested, if it is it looks like a unique D-40.
http://cgi.ebay.com/Guild-D40C-BLK-70s- ... 240%3A1318
http://cgi.ebay.com/Guild-D40C-BLK-70s- ... 240%3A1318