Here’s a Few 78s by Roy Acuff and His Smoky Mountain Boys from the 1940s:
Streamlined Cannonball b/w Mule Skinner Blues (1940) Columbia 20038
There’s a Big Rock in the Road b/w Po’Folks (All The Time) (1947) Columbia 37345
This World Can’t Stand Long b/w It’s So Hard To Smile (1947) Columbia 20454