Great Northern Boxcar 4121 at Denver, Colorado, April 1967. Other subject classes: Box car

Great Northern Boxcar 48820 at Denver, Colorado, April 10, 1965, double wood sided 40 foot boxcar. Other subject classes: Box car

Great Northern Boxcar 50545 at Denver, Colorado, April 10, 1965, double wood sided 40 foot boxcar. Other subject classes: Box car

Great Northern Boxcar 50561 at Denver, Colorado, February 22, 1964, double wood sided 40 foot boxcar. Other subject classes: Box car

Great Northern Boxcar 50561 at Denver, Colorado, February 24, 1964, double wood sided 40 foot boxcar. Other subject classes: Box car

Great Northern Boxcar 50561 at Denver, Colorado, February 22, 1964, double wood sided 40 foot boxcar. Other subject classes: Box car

Great Northern Boxcar 50561 at Denver, Colorado, February 22, 1964, double wood sided 40 foot boxcar. Other subject classes: Box car

Great Northern Boxcar 50561 at Denver, Colorado, February 22, 1964, double wood sided 40 foot boxcar. Other subject classes: Box car

Great Northern Boxcar 50561 at Denver, Colorado, February 22, 1964, double wood sided 40 foot boxcar. Other subject classes: Box car

Great Northern Boxcar 51838 at Denver, Colorado, January 16, 1966, double wood sided 40 foot boxcar. Other subject classes: Box car