Northern Pacific 40.5-foot, wood, war emergency box car number 28110 with one sliding door is on a repair track at Denver, Colorado, on June 1, 1970. The car is part of the 28000-28749 number series. Photo by GJ Werkema. Other subject classes: freight car, wood box car

Northern Pacific box car 2821 in a train in Denver, Colorado, on March 19, 1982. Box car NP 2821 was built by the NP Car Shops in Brainerd, Minnesota, in 1963 as part of the 50-foot, double-door box car series numbered from 2350-2849. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific 50-foot, wagon-top, double sliding door box car 39626 is spotted at a loading ramp at the Denver Union Terminal facility on September 3, 1967. The leased car is part of the 39626-39759 number series. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific 40.75-foot, box car number 42284 with a sliding door is in a train at Denver, Colorado, on February 25, 1976. The car is part of the 42115-42989 number series. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific 50-foot, box car number 6042 with double-doors is in a train at Denver, Colorado, on March 19, 1982. The car is part of the 6000-6499 number series. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific Day/Nite coach at the Burlington passenger station at Denver, Colorado, in January 1971. Photo by GJ Werkema. Other subject classes: passenger car, coach

Northern Pacific 54-foot, flat car number 62467 loaded with heavy equipment in a yard at Albuquerque, New Mexico, on May 21, 1980. The car is part of the 62300-62494 number series. Photo by GJ Werkema. Other subject classes: freight car, flat car

Northern Pacific 54-foot, flat car number 62783 in a train at Pasco, Washington, on October 1, 1971. The car is part of the 62700-62949 number series. Photo by GJ Werkema. Other subject classes: freight car, flat car

Northern Pacific 60-foot, flat car number 66118 in a yard at Albuquerque, New Mexico, on May 25, 1978. 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, gondola car number 50599 in a train at Bellingham, Washington, on July 27, 1977. The car is part of the 50500-50749 number series. Photo by GJ Werkema. Other subject classes: freight car, steel gondola car