Chicago RTA ( Pre Metra) 1970's era EMD F-40PH commuter service locomotive on display at the July 1983 West Chicago Railroad days celebration.

I took this photo at the July 1983 West Chicago Illinois Railroad days Celebration.
This is a big annual event held in far west suburban West Chicago Illinois.

On display wearing the original late 1970's era color scheme, is none other than a Chicago RTA EMD F-40 PH locomotive used in daily commuter train service.