This ad I got from Pasadena is kind of weird because of the added Autobot sigils in the line art and how his right foot looks like it's melting away in robot mode. I suspect what happened was the dino mode was originally oriented facing the opposite direction and the tip of the tail slightly overlapped the foot of the robot. When the ad was laid out the dino mode was clipped off and then mirrored to fit the space better, leaving the robot foot looking misshapen. Aside from that the pose seems really familiar but off the top of my head I can't place the source photograph used to do the line art. I'm intrigued by this one and will have to do more research. Of course I don't have to point out anything because Dinobots do not need explanations for how they are interesting.
Playland Toys 12/07/85
In an unbelievably fortunate coincidence I found a different version of the same line art in an ad from Playland Toys in Tampa, Florida. Sure enough, the dinosaur is connected to the robot and overlaps a little at the foot just like I predicted. I've seen so many instances where retailers cropped the Hasbro produced line art that I wonder why Hasbro didn't separate the robots from their alt modes in the drawings initially. Some retailer edits were so extreme they looked like limb amputations. I guess it wasn't a big deal since line art dwindled away as time went on and retailers shifted towards photographs of figures, leaving mangled robots drawings a quirky footnote in the history of toy robots newspaper ads.