For the justly-famous Milwaukee rib-side boxcars, there
        
        
          is a comprehensive and profusely illustrated article by Pat
        
        
          Wider in
        
        
          
            Railway Prototype Cyclopedia
          
        
        
          (Vol. 13, 2006, pages
        
        
          1–75). These cars were built over a span from 1937 to 1950.
        
        
          Ultimately, the Milwaukee would build over 12,000 box and
        
        
          automobile cars with this distinctive rib-side design. My model,
        
        
          a Rib Side Cars version of the most common 40-foot cars, is
        
        
          MILW 23145, is from a group of 1000 cars built at Milwaukee
        
        
          shops in 1945, numbered 22188–23187 (2).
        
        
          Another pair of boxcars I’ve chosen is from the Baltimore &
        
        
          Ohio. The B&O owned the sixth largest non-hopper freight
        
        
          car fleet in 1950, right behind the Milwaukee Road, as shown
        
        
          in that December 2011 column. The B&O built a series of box
        
        
          cars called “wagon top” cars, a unique design to the B&O, in
        
        
          2: The Milwaukee Road owned quite a few 40-foot and
        
        
          50-foot versions of their distinctive rib-side boxcars, of
        
        
          which this model represents just one example. It is a
        
        
          product of Rib Side Cars, in a ready-to-run styrene form.
        
        
          
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