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
- 177 more...
- ItemWWANT212 - Northern Pacific steam locomotive 1682 in Seattle, Washington, circa 1925.
- ItemWWANT214 - Northern Pacific steam locomotive 1682 near Black River, Washington, circa 1925.
- ItemWWANT215 - Northern Pacific steam locomotive 1685 near Black River, Washington, circa 1940.
- ItemWWANT216 - Northern Pacific steam locomotive 1690 at Argo, Washington, in 1925.
- ItemWWANT217 - Northern Pacific steam locomotive 1694 in Renton, Washington in 1939.
- ItemWWANT218 - Northern Pacific steam locomotive 1699 in Argo, Washington, circa 1940.
- ItemWWANT219 - Northern Pacific steam locomotive 1772 at Seattle, Washington, in 1941.
- ItemWWANT220 - A Northern Pacific steam locomotive at Stampede, Washington, circa 1925.
- ItemWWANT221 - Northern Pacific steam locomotive 1776 at Argo, Washington, in 1947.
- 81 more...