Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series010 - Other Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3012 - Street railroads
- 446 more...
- ItemWWASMR-SPO-006 - Seattle Municipal Railway Track, Seattle, Washington, 1924
- ItemWWASMR-SPO-007 - Seattle Municipal Railway Track, Seattle, Washington, 1929
- ItemWWASMR-SPO-008 - Seattle Municipal Railway Track, Seattle, Washington, 1924
- ItemWWASMR-SPO-008A - Seattle Municipal Railway Track, Seattle, Washington, 1929
- ItemWWASMR-SPO-008B - Seattle Municipal Railway Track, Seattle, Washington, 1930
- ItemWWASMR-SPO-008C - Seattle Municipal Railway Track, Seattle, Washington, 1929
- ItemWWASMR-SPO-009 - Seattle Municipal Railway Track, Seattle, Washington, 1930
- ItemWWASMR-SPO-009A - Seattle Municipal Railway Track, Seattle, Washington, 1930
- ItemWWASMR-SPO-009B - Seattle Municipal Railway Track, Seattle, Washington, 1930
- 1672 more...