I am having some difficulty in identifying this setup. This is a bathroom in an 1920s Edwardian flat in California with original fixtures, I believe. It appears to be some sort of in-line lever diverter to a shower head that's on the other side of the tub.
Can someone please tell me what my options are for replacing the spout/diverter and hot/cold fixtures? How does this system really work? Is it truly in-line (one valve shuts off the sequential feeds). Am I stuck with this original fixture unless I want to repipe? I just simply want to update the fixtures to something more modern without extensive rework.
Thanks,
tzwizard