Here's a scan of the sleeve.
In terms of the rental/clamshell issue, I'm coming to the view that the clamshells were not necessarily for just for rental. Activision released almost all of their Atari catalogue in clamshells here in OZ (they seem to have imported the European international boxes for the Intellivision). it may have been just a cost-cutting measure for what is a small market as it saves on printing specific boxes. CBS may have come to the same conclusion and used the same clamshell for all three consoles with just different printed inserts.
What makes it more complicated is that CBS did clamshells and imported the international stripped boxes but put a specific Australian manual inside, and I have had at least one US Coleco box but with a Oz manual and CBS cart come through my hands (no idea if this was how it was released or if the guy I got the bundle from had cobbled it together).
2725_001.pdf