According to local papers, 765 is the first steam locomotive to travel through Youngstown in about 30 years; I'm trying to figure out the previous engines to pass through, and in particular which was the most recent.
Here's what I know.
1) Bessemer and Lake Erie 643 was moved to Pittsburgh by the P&LE in 1983
2) C&O 614 hauled an excursion around 1980, there's a picture of it passing US Steels recently shuttered Ohio Works
Speculation
1) GTW 4070 (Cuyahoga Valley), ran excursions on the Erie/Erie Lackawanna and B&LE a few times to Conneaut Lake Park, Greenville,
2) Nickel Plate 765 was once disguised as C&O 2765 in the early 1990's, before I was born, don't know much about these excursions, but I think I know someone who might.....
So it is likely either B&LE 643 or "C&O 2765," input is sought. Speaking of the devils,
https://www.youtube.com/watch?v=V1f6LdlOO1g
Bessemer Sam