Thunderbolt 1000 or 1000T?

[jerrylovessirens]

I stand corrected on my assumption.

I'm guessing Federal just started putting caps that had the divider, and solenoid bar holes on all of them. I guess it would make it MUCH better for parts interchangeability, so they wouldn't have to have separate lines for 1000, 1000T, and 1003 caps.

[Thunderboltlover]

Ok. I found out that the siren was put up when the tower was built in 1969.

[Thunderboltlover]

Heres the other one


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