What's this japanese siren?

[KoreanCo]

https://www.youtube.com/watch?v=6hSeOYwsOYw
The siren's last activate video from 11:59:53am to 12:01:00pm of February 17, 2015
If you listen carefully, you can hear SBGM-6WU from afar fire department.
low tone siren is the most common and high tone siren is secondly common.


Hankoku Electric SBGM-6WU (6 port) (50hz)


Unknown Model (Maybe Yahagi siren?) (9 port) (50hz)
Also location of last activate video.

What's this siren? i don't know this model.

[KoreanCo]

yahagi s-600?

[KoreanCo]

or nidec?

[KoreanCo]

i search the google but i can't find the more info.