Here is a Marx Toys tin lithographed 3/16ths scale O gauge freight train.  All of the items in the set are early postwar versions of these.  The set consists of 6 pieces: a #898 stamped steel 0-4-0 steam engine, a New York Central wedge tender, #44572 Chesapeake & Ohio high side gondola, a #652 Shell single dome tank car, a #174580 New York Central Pacemaker boxcar, and a #20102 NYC caboose.  All of the cars have 8 stamped steel 3/16ths type wheels on metal axles and have the metal versions of the tilt couplers on them.  The set is used, but the cars are in pretty nice shape.  Condition-wise, the engine shell is in the worst shape.  Not bad for a set that is likely pushing past sixty years old!  I tested out the engine, and it runs fine in both forward and reverse, and the reverse unit operates as it should.  Great for the layout or around the tree at Christmastime, or perhaps to add to your collection of Marx!  Photos show all of the items from all 6 sides.  Also added a closeup of the underside of the engine, so you can see that this looks to have had very little run time on it. Priced reasonably, with only actual shipping on the roughly 4 1/4 pound package charged to the winner (I do give you a number of shipping options, so you can pick what works best for you).