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
- 167 more...
- ItemWWANT201 - Northern Pacific steam locomotive 1610 at Seattle, Washington, circa 1925.
- ItemWWANT202 - Northern Pacific steam locomotive 1610 at Seattle, Washington, circa 1925.
- ItemWWANT203 - Northern Pacific steam locomotive 1621 at Auburn, Washington, circa 1925.
- ItemWWANT204 - Northern Pacific steam locomotive 1621 at Ostrander, Washington, circa 1925.
- ItemWWANT205 - Northern Pacific steam locomotive 4008 at Martin, Washington, in 1926.
- ItemWWANT206 - Northern Pacific steam locomotive 1671 at Eagle Gorge, Washington, circa 1925.
- ItemWWANT207 - Northern Pacific steam locomotive 1678 at Auburn, Washington, circa 1925.
- ItemWWANT208 - Northern Pacific steam locomotive 1672 at Black River, Washington, in 1938.
- ItemWWANT210 - Northern Pacific steam locomotive 1679 at Seattle, Washington, in 1925.
- 91 more...