this is a B&N Mobil Directo BN54G it is roof mounted is mounted on a 9 story building it was instilled in 4/23/52 and was refurbished and the roof was clean note the grey thing is the hatch to access the siren is gas powered.
name: Biersach & Niedermeyer BN54G stat: active for special events but is is tested regularly a 2:00 pm at Wednesday as well. port: 8 own: own by the old civil defense historic building. mount: on a roof note: the siren was yellow but was repainted as dark green in 2025. credits to @scrach-666
