A lot of the imports by Max Grey were labeled "Perfection Scale Models". I have a couple of PRR models so labeled. I also have a couple of catalogues. He may have used that name on all of his imports.
The model should be 2 rail DC. No center rail pickups. I have never seen a Max Grey loco done in 3 rail, Power from one rail is picked up by the tender and power from the other rail is picked up by the loco. The plug from the tender passes the power to the motor from the tender. It is definitely O scale which which is why sits on your track.
It is possible that the loco has a series wound motor, not a permag motor, but it would still be wired for DC as that was mostly standard practice for 2 rail by the late 50s.
Any track you can get that is O gauge and has the outside rails isolated will work. Gargraves is one option. Atlas O makes 2 rail O track. There is also a mfg called Micro Engineering I think that makes O scale flex track in 2 rail.
