Really racking my memory here. In late 1965, the local freight on the OC Western picked up a new designation - LK-1 (north) and LK-2 (south) running each way daily except Sunday between West Columbus and Stanley, where the crew spent the night. The scheme was set up by the Columbus Trainmaster, Leonard Keen, who put his initials into the train symbol (why not, if it's your call). As best as I can remember, they used one or two GP-7's or -9's.
I know that if I ordered an OC work train out of West Columbus, I could be sure to see an NW-2 or similar EMD switcher. I never had a work train on the Big 4, and in truth we did little work of any kind up there. Between Berwick and Carey, though, it was still in good shape for 40 mph.
There was also a traveling switcher that worked out of Carey, and I'm sure I remember a Baldwin switcher on that job the few times I saw it. I think they went to Sandusky about once a week. That was a real trip, because the eastern 20 miles of the Sheepskin was slow-ordered to 5 mph.
I'm fairly certain that I recognize the Class DES-20 Baldwins, NYC numbers 9308-9328 as the Kenton and Carey switchers. They were renumbered in 1966 for Penn Central to 8092-8112, but I don't know where PC used them.
A little off the territory, but in January 1966 I was at Bryan on the CN when I ordered a work train for VanWert to Jackson and return. We got the 3812, a Baldwin RF-16 A unit that they dredged up from Sharonville. It was a real hoot with that thing running blind in reverse, with the fireman at the back door giving bell signals to the engineer.
I got covered with oil walking back alongside the prime mover. The Delavergne engines had outside valve rods, and they spewed lube oil all over the place.
Gordon