From the looks, I'd say a Mars Rover concept circa mid 50's to early 60's. Probably posted in one of the higher end Sci-Fi mags, though possibly Popular Mech or Popular Science. Perhaps earlier because he's breathing Mars air.
GM actually built a manned moon rover in the early 60's to cash in on the space race. Powered by a Corvair engine, it would have required its own rocket to get off the ground, and another rocket to supply it.