[southwestforests]

Okay, found it. A few decades back I modeled the L&N in N scale.
And my memory wasn't perfect, but was getting there!
Page 200, Louisville & Nashville Passenger Trains by TLC Publishing, 1999. L&N ran a joint service with PRR from New York to "Louisville/Nashville/Memphis" and for that they painted some of the River series 10-6 sleepers in PRR tuscan with PRR style lettering. Also a few corrugated side cars for the NYC to New Orleans Crescent.
Pages 130 & 131 show L&N semi-streamlined 4-6-2 number 295 (built 1925 as a one-off) in tuscan with a maroon band in mid 1940s to match consist for a train named South Wind where L&N hauled the Nashville to Birmingham segment.

So, there are a couple possibilities for models.