2 Brass Copper Antique Fire Alarm From Fire Station Autosonic 80 Not Sure Work For Sale

This set of 2 antique brass fire alarmrs from an old fire station a collector got them for me 5 to start with I sold one have 4 left not sure how to work them I’m sure someone who knows about them can look and see what great condition they are they are beautiful brass fire alarms collectible it’s a set Vulcan Auto-sonic 80 this bundle of two rare you can mount them as display pieces in your home so cool because they are rare 7 inches across and 3 pounds each