A New Mystery

Art Peterson has been sending us more terrific in-service photos of Illinois electric cars (check out the latest additions to the Coal Belt Electric page!) and one of the latest batch caught my eye.

This open car was described on the back as the East St. Louis & Suburban, "running to Central Park on the first day the standard gauge line ran." But there are a few problems: the ESL&S didn't run to anywhere called Central Park that I'm aware of (though I could be wrong); it was all standard gauge, making that reference a bit odd; and this car doesn't really have an ESL&S "look" (most early ESL&S cars had their headlights on their roofs, for one thing, and they tended not to have poling pockets). Anyone have any idea where this might have been taken, either on the ESL&S or not?