I have a pedistal knee hole desk that has two rotating doors, one on each side that slide into the pedistal to reveal shelves with pie crust edging, much like those on a lazy butler table. The doors look like a vertical roll top desk but they are rigid and formed and they don't give like a roll top desk. The top of the desk is sort of a waterfall shape. I haven't been able to locate one like it so I have no idea of it's age or origin. Any help would be appreciated.