We have here a Marx MOTOR ONLY for a later steam engine, probably a #490 or something like that.  This motor is complete, including the side rods, and when I tested it, the engine ran fine.  Remember, this is a one way motor, so it has NO reverse unit and only goes in one direction.  MOST important is the fact that, as you can see in the last of my pics, the fiberboard TABS to place this motor into the mounting bracket on your engine are INTACT.  I see a lot of these motors with those broken or so heavily damaged that you would have a hard time installing them and getting them to stay!  If you have a nice engine shell in need of this type of motor, or if you have some custom project idea that needs a motor, here's your chance!    Photos from all 6 sides, with a penny in the shots for size reference.  Remember, this is an O gauge AC powered motor.  Priced to sell, with FREE shipping included!