Whelen WPS 4008 Air Horn and Alert, 4004 Air Horn

[ver tum]

Finally, a Whelen 4008 video! This is somewhere in Iowa.
http://youtube.com/watch?v=S3he792-KM8

That same day, that city had a severe thunderstorm warning, and a 4004 close to this guy's house can be heard sounding the Air Horn signal in this video, along with some distant Whelens.
http://youtube.com/watch?v=dpGsfPYyT5o

[kswx29]

It is in Davenport, IA
To bad you can't really see the siren, but it has some good audio.

[ver tum]

It sounds just like one of the rare 450 HZ 4004's, but that 4008 seems to handle the lower pitch better.

[sirenman1bd]

To bad you can't really see the siren, but it has some good audio.

Yeah. But it's the first time I've ever seen one!

[bigloudnoise]

Why is the 4008 so rare? Sorry if it's a dumb question, I'm still learning my siren history.