I have got in contact with the designer of these sirens ,his name is John Glenn Powell a retired SONGS employee as an audio engineer ,And he told me that he had an extra siren at his house but didn't have the horns and he said that he'll give it to me. So I told him that I'll come and pick it up. And he didn't charge me anything ,the only thing the siren needs is two motors. The rotor motor needs a 1 HP pool pump type motor. and the blower needs a 5 HP TEFC motor that is signal phase 240 volts. And yes these sirens are pneumatic but that rectangular box that was next to the bottom of the pole was actually a control box. The siren has no diesel compressor ,It is a 5 HP centrifugal blower that is at the top of the siren below the rotor. Also the rotor has 4 ports and the stator has 8 ports. I 'am currently buying both motors for this siren ,and will be here soon. One more thing ,the siren produces 120 db at 100 ft. The spec sheet says 240 and 480 Hz but what that means is it produces 240 Hz with the blower on ,and 480 Hz with the blower off. I 'am not lying about this ,this is really the siren. For proof here are some pictures.
Some pictures are sideways sorry