Northern Pacific boxcar 16696, at Amarillo, Texas, August 1973.

Northern Pacific 41.5-foot, open hopper car number 85421 in a yard at Denver, Colorado, on June 23, 1972. The car is part of the 85100-85499 number series. Photo by GJ Werkema. Other subject classes: frieght car, open hopper car, Selective Ballast car

Northern Pacific 36-foot, 2-bay, covered hopper car number 75219 in a cut of cars at Amarillo, Texas, on August 6, 1980. The car is part of the 75200-75299 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 49.5-foot, 3-bay, covered hopper car number 75683 on a siding at Amarillo, Texas, on July 18, 1979. The car is part of the 75665-75689 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 57.25-foot, 3-bay, covered hopper car number 76404 in a yard at Amarillo, Texas, on December 12, 1979. The car is part of the 76400-76499 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 35.75-foot, 2-bay, covered hopper car number 76502 on a siding at Amarillo, Texas, on August 6, 1980. The car is part of the 76500-76529 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 35.75-foot, 2-bay, covered hopper car number 76502 on a siding at Amarillo, Texas, on August 6, 1980. The car is part of the 76500-76529 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 49.5-foot, 3-bay, covered hopper car number 76561 on a siding at Amarillo, Texas, on August 6, 1980. The car is part of the 76543-76642 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 49.5-foot, 3-bay, covered hopper car number 76717 on a siding at Amarillo, Texas, on December 12, 1979. The car is part of the 76700-76999 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car

Northern Pacific 49.5-foot, 3-bay, covered hopper car number 76717 on a siding at Amarillo, Texas, on December 12, 1979. The car is part of the 76700-76999 number series. Photo by GJ Werkema. Other subject classes: freight car, covered hopper car