Federal Signal 3T22 Uploaded · August 9, 2023 If you liked this item, please rate it up on Steam Workshop page. Author: G.Curnutt Last revision: 6 May, 2018 at 02:40 UTC File size: 17.41 KB On Steam Workshop Description: A 3 signal, dual toned siren for civil defense purposes. Production: 1955(?) – mid 1980s Download