Chicago, Milwaukee, St. Paul & Pacific Railroad Company observation car "Cedar Rapids" at Denver, Colorado, on May 26, 1989. Milw streamline observation car, Cedar Rapids, at Denver in 1980. Photo by J.M. Fredrickson. Other Subject Classes: observation car.

Denver & Rio Grande Western Railroad steam locomotive 268 on display at an amusement park in Denver, Colorado, circa 1965. Jim's two sons Tim and Jim in photo. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive

Northern Pacific 50-foot, single plug door, insulated refrigerator car 96158 is in a yard at Denver, Colorado, on October 18, 1982. The car is part of the 96000-96199 number series. Photo by GJ Werkema. Other subject classes: freight car, refrigerator car

Northern Pacific 50-foot, single plug door, refrigerator car 97836 is in a train at Denver, Colorado, on February 11, 1990. The car is part of the 97800-97899 number series. Photo by GJ Werkema. Other subject classes: freight car, refrigerator car

Northern Pacific box car 1005 on a yard track in Denver, Colorado, no date. Box car NP 1005 was built by Pullman Standard in 1945 as part of the 29000-29499 40-foot box car series. In 1954, NP 1005 was one of 10 cars that had Evans DF Loader Systems installed, given a green with white strip paint scheme, and renumbered to 1000-1009. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific 40.75-foot, box car number 15529 with one sliding door is in a yard at Denver, Colorado, on April 10, 1965. The car is part of the 15500-15999 number series. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific box car 1853 in a train in Denver, Colorado, on May 10, 1978. Box car NP 1853 was built by the NP Car Shops in Brainerd, Minnesota, over 1967-69 as part of the 50-foot, plug door box car series numbered from 1700 to 1999. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific 40.75-foot, box car number 27316 with one sliding door is on a siding at Denver, Colorado, on January 26, 1982. The car is part of the 26000-27349 number series. Photo by GJ Werkema. Other subject classes: freight car, steel box car

Northern Pacific 40.5-foot, wood, war emergency box car number 28317 with one sliding door is in a train at Denver, Colorado, on June 10, 1967. The car is part of the 28000-28749 number series. Photo by GJ Werkema. Other subject classes: freight car, wood box car

Northern Pacific 40.5-foot, wood, war emergency box car number 28014 with one sliding door is in a yard 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