Sun Jul 23, 2017 7:36 pm
It's possible that it is a siren, although it is highly unlikely that it is one. If it is a 550, then that's pretty freaking neat.
My knowledge excels on the Federal Thunderbolt siren and SiraTone EOWS sirens. ¯\_(ツ)_/¯
Proud owner of
2014 Federal UltraVoice UVICU
1981 SiraTone C/B prototype
1984 SiraTone C/B