If you can identify where the knobs came from and what building it doesn't hurt to divulge this if you decide to run them on Ebay. I bought the one shown and made a cane, it was supposed to come from a public school in Philadelphia where someone famous went to school. I've forgotten who now. I put three or four ounces of lead bird shot in the door knob, so now when I walk thru the valley of death I fear no evil because I'm the evilest so-and-so in the valley.