Yep, it is an evacuation slide panel.
Does anyone else think it is amazing how large a slide can deploy out of such a relatively small access panel?
The slide, when rolled up, is relatively small. The slide first deploys, and then inflates, so that might help with the confusion.
I always thought that the over-wing slide was much more parallel to the aircraft, like the over-wing slide on the 747.
The SAA 346 safety card shows the slide being yellow, but that was most likely done for the benefit of the safety card reader, so is there a difference between yellow- and silver-colored slides?