This from Tom Podraza:
Found on the Mack CF facebook page.. Former Belmont FPD later Darien/ Woodridge 1975 mack is being auctioned
1975 MACK Fire Truck – Serial Number CF611F1732

1975 MACK Fire Truck – Serial Number CF611F1732 for sale by auction

1975 MACK Fire Truck – Serial Number CF611F1732 for sale by auction

1975 MACK Fire Truck – Serial Number CF611F1732 for sale by auction

1975 MACK Fire Truck – Serial Number CF611F1732 for sale by auction