I remember seeing ROTJ in letterbox on TV as a child. I had never seen a letterbox film (only P&S), so I thought there was something wrong with the TV because of the black bars. I'm not sure what station that was on. My guess would be TCM since they usually air films as they were meant to be seen, uncut, commercial free and in the correct aspect ratio. I think I saw ROTJ in letterbox before TCM existed and I'm not even sure if TCM has ever aired any of the Star Wars films. This was sometime in the early 90s.