Featured in this lot are four, Great Northern Railway "Empire Builder" calendars with Winold Reiss artwork from 1945, 1947, 1950 and 1955. Winold Reiss was a German-born American artist and graphic designer. In 1920, he went West for the first time, working for months on the Blackfeet Reservation in Montana, painting 36 portraits of tribal members. Over the years Reiss painted more than 250 works depicting Native Americans. These paintings by Reiss became known more widely beginning in the 1920s to the 1950s, when the Great Northern Railway commissioned Reiss to do paintings of the Blackfeet which were then distributed widely as lithographed reproductions on Great Northern calendars. In 1931, and 1934-37, Reiss organized a summer art school, also referred to as an artists' colony near Glacier National Park. The first one from 1945 shows the artwork "Wades In The Water - Blackfeet Indian Chief" and reads, "Route of the Empire Builder / Between Chicago and the Pacific Northwest Via Glacier National Park". It only features the months of November and December 1945. The second calendar shows the artwork "Dancing Boy - Blackfeet Indian" and reads, "Route of the Streamlined Empire Builder / Between Chicago And The Pacific Northwest Via Glacier National Park". It only features the month of December 1947 on the calendar section. The third calendar is from 1951 and features "Angry Bull - Blackfeet Indian Hunter" wearing a large headdress. It features the full calendar for 1951 and the month of December, 1950. It reads, "Route of the Empire Builder". The fourth and final poster calendar shows "Many guns - Blackfeet Indian Brave" wearing a large headdress. Below him it reads, "Route of Great Streamliners Empire Builder Western Star". It features only the month of December, 1955 and reads below it, "Great Northern Railway - Daily Between Chicago and Seattle - Portland". The calendars show good condition overall with slight wear present from their age and use over the years, but no major signs of damage is noted. Wear to edges and corners and slight tears can be seen. The measure 33 3/8" L x 16" W and have a collective weight of 10 ounces.