It's very hard to tell from those photos. Any chance you've got a better camera?
System22 came in a silver box of sorts, much like most of the systems of that era:
http://www.system16.com/hardware.php?id=537
Attached is often a separate I/O board, which is easy to spot as it connects directly to your game controls and speaker. That should be the give away.
Usual warnings apply: don't touch the monitor or chassis (the board that drives the monitor). Both hold high voltage for quite some time, and will give you a painful (and possibly damaging if it throws you or your limbs) shock should you touch it.