Hi guys! I'm a new member so I hope you don't mind me 'butting in' :)
This is a really interesting discussion, and it so happens that I own the original Star Wars movies on their respective VHS's from the 1980's. If these are of any use for comparisons or just general interest, then I will gladly do some screenshots or rip them to a DVD/my PC. They're in very good condition (I hadn't watched them in years till the other day) and provide a startling insight into how the films looked at that point in time.
Great website by the way, I look forward to contributing more!
TC