Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 138 more...
- ItemWWANT171 - Northern Pacific steam locomotive 1123 at Seattle, Washington, in 1949.
- ItemWWANT172 - Northern Pacific steam locomotive 1123 at Seattle, Washington, in 1949.
- ItemWWANT173 - Northern Pacific steam locomotive 1123 at Seattle, Washington, circa 1940.
- ItemWWANT174 - Northern Pacific steam locomotive 1126 at Seattle, Washington, in 1949.
- ItemWWANT175 - Northern Pacific steam locomotive 1153 at Seattle, Washington, circa 1925.
- ItemWWANT176 - Northern Pacific steam locomotive 1156 at Seattle, Washington, in 1925.
- ItemWWANT177 - Northern Pacific steam locomotive 1158 at Seattle, Washington, circa 1925.
- ItemWWANT178 - Northern Pacific steam locomotive 1263 at Argo, Washington, in 1924.
- ItemWWANT179 - Northern Pacific steam locomotive 1263 at Seattle, Washington, circa 1925.
- 121 more...