The motorized siren was used throughout the country during the Cold War. Originally intended to warn the population, the standard siren, E 57 for short, was decommissioned in many places in 1957 after the immediate threat. Nowadays, however, it is still used by many municipalities and communities to alert fire departments. 
These motorized sirens are usually overhauled, but are still state of the art from the 1950s.

We recommend replacing old motorized sirens with more economical and efficient electronic sirens from SONNENBURG!