Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series005 - Pacific Coast Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3006 - Cabooses (Railroads)
- 20 more...
- ItemWWAPC0300 - Pacific Coast Railroad caboose number X1 at unknown, Washington, circa 1956.
- ItemWWAPC0564 - Pacific Coast Railroad caboose number X1 at Renton, Washington, circa 1965.
- ItemWWAPCN0104 - Pacific Coast Railroad caboose number 53 at Renton, Washington in 1946.
- ItemWWAPCN0172 - Pacific Coast Railroad freight train at Taylor, Washington in 1944.
- ItemWWAPCN0322 - Pacific Coast Railroad caboose number 53 near Maple Valley Washington, circa 1946.