I recently saw this on one of my FB feeds, the person was asking what it was as the label was unreadable. It is obviously an old flush valve of some sort. I did a google lens search and had no luck. It appears to work similar to a Sloan valve, I think I am seeing a diaphragm on the right that might work on differential pressure and the main flush body with an adjustable spring under the acorn nut on the right. It looks like the tubing running out of the bottom needs to be hooked up to something. Has anyone ever seen this before and know the brand or anything about it? Thanks in advance.