Fedelcode Mach 7 is a siren made by Federal Electric. Made in the early times of 1930's (Maybe) Were installed in Los Angeles on December 20th 1941.
Some were 3Hp And 7.5Hp. These went into working condition on January 9th 1942. They have lower shrouds collapsed onto each other!
Used for Air raids, and Cold war Too!!!!
There were 60 Sirens In Total Of the Mach 7 In Los Angeles.
These were made to last to a whopping 500 YEARS!!!!!
(Update! These Are Fedelcode Mach 7 Really!)