The 6755 was a class M1a and was used predominantly in freight service, though it would occasionally be used for passenger trains.

Prolonged exposure to the elements has wreaked havoc on major parts of the locomotive, causing structural rust.

6755 is one of the locomotives the museum plans to place inside the roundhouse currently under construction as of 2025.

[needs update] NYC 3001- This is the New York Central Railroad's version of the M1 that survives.

This article about a property in Pennsylvania on the National Register of Historic Places is a stub.