I know this is an old post, but I was reading it and wanted to give some information. Here in Colorado Springs Colorado, we used to have sirens. They all had Scream Master poles but had different heads on them. We had Federal Signal 550 AT's, Model 5T,s, Mobil Directo's and Thunderbolt 1000's, again...

Hi, I'm new to the Siren Board, but have seen this interesting post about Scream Master. Here in Colorado Springs, Colorado, between 1959 and 1989, we had a lot of air raid sirens throughout the city and El Paso county. They were a mix of: Federal Signal 550AT's, Model 5T's, B&N Mobil Directos, ...