1940's vintage Craftsman Mitre Gage (miter gauge) with a 5/8" wide bar that is 3/16" thick. It would fit the old 7" table saw for sure and probably others. I have seen the exact same miter gauge with the Walker Turner Driver Line on it, so am not sure of the manufacturer but this is marked as Craftsman and has a geared and indexing head that indexes nicely by 15 degree segments. It is adjustable too. Everything works fine on it and there is no major damage, but the finish is worn somewhat and there is rust on the metal parts. No pitting that I could find.