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
- 144 more...
- 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.
- ItemWWANT180 - Northern Pacific steam locomotive 1263 at Seattle, Washington, circa 1925.
- ItemWWANT181 - Northern Pacific steam locomotive 1263 at Seattle, Washington, circa 1925.
- ItemWWANT182 - Northern Pacific steam locomotive 1263 at Seattle, Washington, in 1924.
- ItemWWANT183 - Northern Pacific steam locomotive 1266 at Seattle, Washington, in 1925.
- ItemWWANT184 - Northern Pacific steam locomotive 1266 at Seattle, Washington, circa 1925.
- ItemWWANT185 - Northern Pacific steam locomotive 1357 at Auburn, Washington, circa 1925.
- 115 more...