Bethlehem, NH

Diaphragm Horns - Bethlehem Town Fire Dept. (44.28061685770849, -71.68681001955912). No idea if used or not, I would guess not. Also no idea what exactly they are, appear similar to the ones in Bar Harbor, ME? Could not find any info. Submitted by NETrains&Sirens/ThatOneSirenGuy.