Just so happens I used to live just across the state line from Danville when I was a young-un. My dad worked in Danville at Bohn Aluminum for about a year. Bohn Aluminum was in Hammond, Indiana, where Pops was born and raised, and moved to Danville in 1956. We moved down that way at the same time. I never realized what exactly Bohn made, being only six years old at the time, but I remember they had a corporate softball team and Pops pitching for them.
Both photos are from The Old Motor which has two entries about the Bohn Corporation. The Indy car has cylinder heads cast from Bohn aluminum according to the site. I'm not sure what all they did at the Danville plant but Surly has a tool box Pops had made up from crinkle finish aluminum sheet when he worked there.
Since Danville is about two hours away from here, I think I might take a bike ride down that way come spring time. Check out Midwest Aero Restorations and run back across the state line and buzz through my old hometown.