The River Patrol looks like a Midway cabinet with a horizontal monitor in it. I'm assuming those are tiny P1 and P2 buttons on the top-right of the control panel? And also, that's the back of the "river patrol" cabinet in the background of the first Golden Axe photo?
Going by all that, guess #1 from this enthusiastic rookie is going to be that it was a Bosconian cabinet, with an original (but stripped clean) bosconian control panel. Does it have a serial number on the back, above the door?
Oh, and River Patrol doesn't look to be very exciting at first glance. Looks to be a great restoration project though, putting it back to a Bosco. Not many of them around.
-Hans