Here is a lot of two different Marx 3/16ths scale tin freight cars on the standard 3/16ths trucks. They all have 8 stamped metal wheels on metal axles and metal tilt style couplers.  There is a 174580 red and gray New York Central Pacemaker boxcar, and a 20102 NYC red and gray caboose.  Look over the photos as THEY are the description here.  Photos from all 6 sides, with a yardstick in the shots for size reference.  Great for operators, customizers, or perhaps as a source for parts.  Priced to sell, with only actual USPS Ground Advantage or Priority shipping for the 1 1/2 pound package charged!