Chief I always wondered what that strange sounding siren was coming from the rigs of the FDNY. I'm sure they were used in other places too. But as a kid going back to the 1950s, the only place I ever remember hearing that was if I saw a fire on the news in NYC (on black and white TV).
Also, I'd like to thank Jamie for posting these videos too. They are classics and quite a collection.
Those videos teamed up with Mike's pictures (www.fdnysbravest.com), on this web site, and you have yourself "The Perfect Package Deal".