TServo2049 said:

The transition between the '81 crawl and '77 flyover is also a dissolve. Perhaps both dissolves were on the print itself - but to answer that question, we'd have to find a flat 16mm that specifically has the ANH crawl.

Had a second look at it and no, it's definitely a straight cut.

The dissolve to the end credits suggests the source had the opening day credits in place but it could also be a simple case were they wanted to have the credit card centered and didn't want to alter their set pan & scan decision - they had five options on how to treat it.

1) letterbox it

2) squeeze it

3) include the full body of Chewie

4) include the full body of Threepio

5) include one half of Chewie and Threepio

The operator went with nr 3, and maybe the dissolve was added so they could have the credit card centered. But then again, they opted to squeeze the credit roll...