| No. | Class | F.M. Whyte | Gauge | Railroad Line | Location | Status | Builder Info | Notes |
|---|---|---|---|---|---|---|---|---|
| 643 (5) | B4a | 0-6-0 | 4'-8½" | PRR (Central Iron & Steel) | Williams Grove Historical Steam Engine Association, Dillsburg, PA | operational | PRR (Altoona) #2184, 1901 | Operated on the PRR from 1901-1917=16 years. Operated for a steel mill from 1917-1961=44 years. Operated for the WGHSEA from 1961-2026=65 years. Currently the only operational PRR steam locomotive. |