File:B&O Royal Blue in 1937.jpg
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カテゴリ:
- Royal Blue (train)
- Trains in motion
- Otto Kuhler
- Thomas Viaduct
- Streamlined steam locomotives
- 1937 in Maryland
- 1937 in rail transport in the United States
- 4-6-2 locomotives of the United States
- Baltimore and Ohio Railroad P-7 Class
- Black and white photographs of Maryland
- Trains on bridges in the United States
- Black and white photographs of trains in the United States in the 1930s