Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series007 - Spokane, Portland, and Seattle Railway
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 417 more...
- ItemWWASPSS-07-019 - Spokane, Portland and Seattle (SP&S) Steam Locomotive Number 551, Vancouver, Washington, March 1951
- ItemWWASPSS-07-020 - Spokane, Portland and Seattle (SP&S) Steam Locomotive Number 551, undated
- ItemWWASPSS-07-021 - Spokane, Portland and Seattle (SP&S) Steam Locomotive Number 551, Vancouver, Washington, March 1951
- ItemWWASPSS-07-022 - Spokane, Portland and Seattle (SP&S) Steam Locomotive Number 551, undated
- ItemWWASPSS-07-023 - Spokane, Portland and Seattle (SP&S) Steam Locomotive Number 60X, undated
- ItemWWASPSS-07-024 - Spokane, Portland and Seattle (SP&S) Steam Locomotive Number 600, Portland, Oregon, undated
- ItemWWASPSS-07-025 - Spokane, Portland and Seattle (SP&S) Steam Locomotive Number 600, Portland, Oregon, circa 1910
- ItemWWASPSS-07-026 - Spokane, Portland and Seattle (SP&S) Steam Locomotive Number 600, undated
- ItemWWASPSS-07-027 - Spokane, Portland and Seattle (SP&S) Steam Locomotive Number 601, Portland, Oregon, undated
- 524 more...