I know that this siren has been the topic for discussion many times on this board, it has remained a mystery and is rumored to be a 2T22 vertically mounted. I visited Country Lakes and took many pictures of this siren (which are on the computer at the fire station right now and not with me). It appears to have an 8 and 12 port rotor, I know that is not a normal combination and I have no idea how it would sound, the only thing I can imagine would be that it could two seperate motors in there, one that spins the 12 port and one that spins the 8 port and this is how it accomplishes "coding" or zoned dispatching. I will post my pics as soon as I get to the firehouse... here is the siren gallery picture to refresh everyone's memory.