In the 1980s I volunteered with Fort Wayne Railroad Historical Society's Nickel Plate Railroad locomotive 765. That was when there were mainline excursions with big power, at speed. All-day excursions with 500 or more seats often sold out both days of a weekend.
In this photo, NKP 765 is headed to Chicago in 1985 with one coach and a freight train to drop off at the EJ&E interchange. The engine will proceed to Proviso yard to power a series of excursions on the Northwestern. Here 765 waits in a siding in 1985 as a Norfolk-Southern freight train passes. The photo below is a
link to a large set of NKP 765 shop and excursion photos on my web site: