Well, it wasn't hard, I only needed the first 12 seconds - the top one was the only one where Tatooine appears on the correct cue, so it had to be '77, the bottom one had the same starfield as the top one, but Tatooine appeared on the wrong cue, so it had to be '97 and the middle one also had the wrong cue and you said they were all different versions, so it had to be '81 (I would have recognized the '81 by the starfield as well, if it was visible).

Isn't it a little sad, that in higher quality I could quite likely have recognized which is which just by a still image of the starfields before the pandown starts? :-D