Motorola 500???

I have found a Motorola Radio that looks like a car radio. It has a full metal case shaped like garfields head.. the speaker is in front with holes covered in cloth. It has one Knob in front and two adjustments on the side, one being the station finder. It reads 'Motorola across the front and 500 verticle in the middle...I cannot find this radio on the web anywhere and would like some type information..I have Pic's but do not understand how to load them here.. I have no idea of the voltage so am afraid to smoke test it.;.Any hep...Thanks Jim...Pic's at dhalluin@hintonet.net