I have an old house with black metal boxes on which there were old wall scones. All of the boxes have a threaded nipple in them which held the previous sconces. I am able to use a hickey to attach the new sconce via a threaded rod which works but there is nothing to counter rotation of the sconce around the thread. I could probably screw in some small "anchor" screws to help secure it better but I was wondering if these old style boxes have any kind of mounting holes that a universal mounting plate might work with. Thank you.
In answer to your question and looking at this picture. I don't think so. You're probably better off doing as little as possible with the wiring in this house. Be very careful. The only thing that I see here that is younger than me (including the method of installation) are the yellow wire nuts and the black pigtail.