07VFDInLCD wrote: ↑Tue Jan 25, 2022 12:51 amVintagecollections wrote: ↑Mon Jan 24, 2022 3:10 pmIt’s a Federal 20. Has to be. I own a model 7, the rotor and stator are identical except it’s an 8 port rather than 12.In the picture you posted, the vanes on the rotor are vastly different. The ones on your Federal, when viewed horizontally from the side, are straight. The ones on the mystery siren have an exponential curve.
Federal vs mystery siren.png
Federal vs mystery siren comparison.png
Hm. Didn’t totally catch that. It still seems to be federal, I do also see resemblance in the stator mounts, where they bolt on and have the distinct brackets like on my type 7, alike the base on mine (where the 2nd stator on your Uncle’s attaches. Also, I found a photo of a rusty model 20 which is near identical (if not identical) to your Uncle’s one: