Understood about the round-bar but my point was just that the end-mounted jointer fence is not exclusive to Craftsman.I thought the same thing until I saw that OP’s jointer has a cylinder for the fence adjustment!
A number of companies used end-mounted jointer fences on round bars including Sprunger and my Robland.
An intriguing detail to me is the use of an old-school 'star' knob to lock the fence. It looks the same/very similar to the knobs off Delta 14" bandsaws. Possible that was recycled from somewhere else, it's just an unusual knob for this vintage of machine - circled in red below.
-Mark