I found some old siren hardware in my school building (built 1958). I figured you all here would know 10x more about it than me. What would this be used for, what's the CD logo, how would it have been triggered, what's the gray box for, would it still possibly work, and is it likely that the actual siren hardware is still out there on the roof somewhere?
https://imgur.com/a/x465EQk