The Westerfield GN 50' single wood sheath box car is Pratt truss construction correct for the 42000-42899 series, 42900-42999 with full end doors, and 43000-43049. The 43050-43499 had 3/3/3 dreadnought ends. The 29000-29999 and the 38900-38999 were Howe truss side construction. "5100" seems to be an incorrect number.
