My former tenants jacked up the bathtub in my rental house. The 1954 tub hardware was removed and it's missing. I don't don't know how to disconnect the drain because it is different then anything I ever worked on. I need to disconnect the tub, attempt to remove it, and check the line for blockages. The whole thing is not good.
edit: I am going to pick up a universal extraction tool and see if that can move the drain ring or not; there is no crossbar in it so my other removal tool won't work.