This Craftsman kit will build a model of a NP Shops built 50’ 5” Interior Length, Plate B Box Car with a 6ft Youngstown Sliding Door and a 8ft “V” bar Exterior Post Plug Door. Built in 1966 with a capacity of 4129 Cu Ft and End of car Cushioning.
Originally delivered for Northern Pacific in NP Dark Green numbered 5300-5699, and after the BN Merger were repainted in Cascade Green and numbered 315300-315699. These cars have a notched side sill and a unique horizontal waffle between the vertical exterior ribs and Pullman Standard Bow Tie Overhanging roof.
Thanks to Christian Tucker for noticing several details I had missed. I've stolen a couple of his build images to clarify some construction