Northern Pacific 50-foot, box car number 7836 with double-doors is in a yard at Albuquerque, New Mexico, on November 29, 1978. The car is part of the 7500-7899 number series. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific 50-foot boxcar 3986, a sliding and plug door car from the 3882-3999 series is pictured in the yard at Albuquerque, New Mexico, on July 10, 1972. Photo by GJ Werkema. Other subject classes: freight car, steel box car,

Northern Pacific 50-foot boxcar 4079, a double-door car from the 4000-4499 series is pictured in the yard at Albuquerque, New Mexico, on June 28, 1978. Photo by GJ Werkema. Other subject classes: freight car, steel box car,

Northern Pacific 50-foot boxcar 4302, a double-door car from the 4000-4499 series is pictured in the yard at Albuquerque, New Mexico, on October 1, 1978. Photo by GJ Werkema. Other subject classes: freight car, steel box car,

Northern Pacific 50-foot boxcar 4402, a double-door car from the 4000-4499 series is pictured in the yard at Albuquerque, New Mexico, on April 16, 1978. Photo by GJ Werkema. Other subject classes: freight car, steel box car,

Northern Pacific 54-foot, flat car number 62475 in a train at Pasco, Washington, on October 1, 1971. The car is part of the 62300-62494 number series. Photo by GJ Werkema. Other subject classes: freight car, flat car

Northern Pacific 53.5-foot, flat car number 65001 equipped to carry highway trailers in a yard at Denver, Colorado, in August 1973. The car is part of the 65000-65059 number series. Photo by GJ Werkema. Other subject classes: freight car, flat car, TOFC

Northern Pacific 60-foot, flat car number 66126 in a yard at Denver, Colorado, in January 6, 1990. The car is part of the 66100-66244 number series. Photo by GJ Werkema. Other subject classes: freight car, flat car

Northern Pacific 60-foot, flat car number 66133 in a train at Albuquerque, New Mexico, in May 13, 1979. The car is part of the 66100-66244 number series. Photo by GJ Werkema. Other subject classes: freight car, flat car

Northern Pacific 41.5-foot, drop-bottom, gondola car number 58370 in a siding at Bellingham, Washington, on August 3, 1977. The car is part of the 58250-58749 number series. Photo by GJ Werkema. Other subject classes: freight car, steel gondola car