3/4" drive aluminum alloy Craftsman V 44801. Sold this a few years ago, never seen another. Weighs 2 Lb. 14.2 oz. Used to find online reference to Craftsman Industrial Tools with this ratchet.
I have noticed the stationary, possibly older Mercury #4 vise does not have "Vise" cast in the side, whereas the "newer"? #4's that rotate do say "Vise" on the side below the anvil. Just my observations.