These appear to be Dualmatic hubs with the Free-Lock private label. They certainly are rare.
“This is a very rare set of Free-Lock locking hubs. Free-Lock was made in Denver Colorado in the 50’s. Dalamatic Hub company may have bought Free-Lock. Thes sure look just like the Selectro hubs you see today. They are 10 spline, and works with all Willy’s & CJ jeeps from 1941 to 1971. Hubs are in good working order. Thanks for looking!”