This is a Marx O gauge #4586 Union Pacific work caboose in red with black lettering, which is one of the harder to find of the Marx work cabooses.  It comes on the stamped side frames type G trucks, which has the 8 stamped metal wheels and metal axles.  This one is complete and in fairly nice shape EXCEPT that the little black plastic brake wheel on the rear platform is missing (they do make reproduction brake wheels, though).  Has the 8 stamped metal wheels on metal axles, and plastic tilt couplers on both ends.  Light tarnish on the wheels and axles.   Photos show the car from all 6 sides, with a yardstick in the shots for size reference (it is O gauge, runs on Marx 3 rail train track, which is pretty much the same size as Lionel O-27).  Priced to sell, with only actual USPS Ground Advantage or Priority shipping cost charged to the winner!