Here is a rather rare Marx 4 wheel plastic freight car. It is a black Marlines coal tender with white lettering. Tender is equipped with 4 metal wheels on metal axles and tab and slot type couplers. 

The tender main body is in good shape, but one simulated side wheel is broke off.

See the pictures for all the details.

Length is around 6 inches.

Pre owned in very nice condition, except for that one little break on the plastic wheel.

Metal couplers are excellent, as are the four metal wheels.