Im curious as to how old that thing is...
The piece came from a tug boat that was launched in the late 60's. I have dove some wrecks in the same area that were as old as WWI but never got a toilet from them.LOL Just "junk" old brass gauges and knobs.
I even had a chance to dive a very old wooden wreck near Manasquan that had cannons recovered off of it but again no toilets. The guy that showed me the wreck found some neat cannon balls.