| No. | Class | F.M. Whyte | Gauge | Railroad Line | Location | Status | Builder Info | Notes |
|---|---|---|---|---|---|---|---|---|
| 25 | F | 4-4-0 | 4'-8½" | B&O | B&O Railroad Museum, Baltimore, MD | display | Mason Machine Works #46, 1856 | Named William Mason. Used to be oldest operational standard gauge steam locomotive on earth, featured in 'The Great Locomotive Chase' (1956). Previously operated in 2012. Cosmetically restored in 2017. |
| 3 (518) | 0-6-4T | 4'-8½" | H&TL (C&HM) | Greenfield Village, Dearborn, MI | operational | Mason Machine Works #518, 1873 | Named Torch Lake. Only surviving Mason Bogie 0-6-4T type locomotive. Oldest operating steam locomotive in the USA. |
