Vintage Door Knob Lot 3 Sets (1) Porcelain (1) Clear Glass (1) Metal Used. This Lot has some good pieces. The porcelain set is missing a set screws and has some age cracks on the knob visible in pics. The glass set is in good shape with a new set screw and the other doesn’t move. The Metal set is complete and functions properly. Please see pics for visual inspection and please contact me with any questions. Condition is Used