This from Mike Summa:

Here is a photo of Chicago Ridge Engine 3, a 1950’s Mack B.  Picture taken off  the Ridge’s facebook.  Identity of firemen not known.  I was surprised, as I did not know Chicago Ridge was a Fire Protection District.  Enjoy and comment.
Mike Summa
Chicago Ridge Chicago Ridge FPD Engine 3, a 1950's Mack B

photo from the Chicago Ridge FPD Facebook page