Ah! OK, that's not a Rohm/RG family gun. That's good.
It *might* be connected to the Sauer single actions coming out of Germany around that time, or it might not. But at least it ain't an RG.
Hmmm...plastic grip isn't a great sign, but surprisingly it has a pinned barrel. Appears to have a Colt-type flat mainspring based on the visible screw at the lower front of the grip frame. Metal-to-metal finish appears to be decent. Looks like somebody was at least trying to make at least a fairly good gun here.
Huh. Never seen one before.
One of 'em appears to have sold for $125 recently: