this is a SONGS model 120 it was installed in 1982 part of the San Onofre Nuclear Generating Station siren this one is a refurbished unit is near a park/Museum and goes of for special events like 4th of July and March 1st civil defence day or if there a emergency.
name: SONGS model 120 stat: active port: 4 port own: was San Onofre Nuclear Generating Station siren now ex-San Onofre Nuclear Generating Station siren and now own by the Museum mount: on a metal pole credits to @scrach-666