Santa Fe 3751
Atchison, Topeka and Santa Fe 3751 is the same class as its number, a 4-8-4 "Northern" type steam locomotive built in May 1927 by the Baldwin Locomotive Workds in Eddystone (Philadelphia), Pennsylvania for the ATSF. It was retired back in August 23, 1953, but preserved back in 1958, the locomotive had a speed of over 100 mph.
Credit to Orion_Blackstorm with something I didn’t know about until he found out via a test platform he made.