Feallan said:

I'm not sure if that's the case, the list appears to be chronological. "Revival theatres" suggests it's about 1981 re-release. Not sure about the DVD part though, maybe it means 1981 dub was on GOUT.

Does your dub have someone reading crawl text? If yes, maybe the reader says "Episode 4..." in Japanese?

Also, I think your dub is either the first, or second one. 3,4,6 were made for some TV broadcasts, and 5 is on Blu-ray, so it's special edition.

Well, Greedo is dubbed in the one I have, so that means it's either no.2 or no.5 and since no.5 is DVD and BD dub, I guess it's quite save to assume it's no.2, which of course still doesn't conclusively give us a year in which it was made.

EDIT: OK, through some more research, I came to the conclusion, that it was made in 1978.