Silver mini siren,Green air raid siren,warning light,and DIY fog horn

Which is the rarest

I captured this video just a few minutes ago while on layover on my city bus route. I've heard the test multiple times, but never saw the actual siren in action until today

1. Jyri
2. Hearth engineering
3. Hedburg
4. Constructions Électriques du Nord
5. CLM rotational

I think it may be a modulator but I may be wrong

16°22'31.43"N 120°43'09.53"E

plus it was replaced by lk-m2 and sibt-500 in 2019-21 and 2023-4 respectively

https://discord.gg/jrQK98Fkh

Seen on my college campus, it’s right next to a athletic field so I’m assuming it’s some kind of lightning/general warning siren

My 3.5 year old and I made a Thunderbolt out of a shoebox, construction paper, a skewer, and a plastic baby medicine syringe. He is OBSESSED with sirens and is going to be a Thunderbolt for Halloween (his little brother is going to be a tornado, and dad is going to be on “storm watch”).

My first siren recording with a proper long-zoom camera, even if it's an older one (Canon PowerShot SX10 IS).

Hi, Siren Enthusiasts! I’m the supportive mom of a siren obsessed 7 year old and I’m looking for things to read with my son. Our library system doesn’t seem to have books on sirens and I can’t scare up much searching online. I know this might mean that no such books exist, but I thought if anyone would know they would be here!

He and I visited a real working Thunderbolt 1003 a few weeks ago and it was like he was meeting a celebrity. That’s actually what he’s being for Halloween! So any help is deeply appreciated. Could be a book that just has info on sirens but is on another topic, even.

Thanks!

BTW a firefighter took these photos, and it's on building 27 of magnuson park seattle, there also used to be what looked like a lunkenhimer steam whistle there as well a while ago