The system they have contains National Time and Signal 511s and National Time and Signal 641 pull stations. They also in the newer part of the building they have 270 SPOs. The original system was Simplex Time and recorder 4032s which are extremely rare and they have 4 remaining in the indoor track. The 4032s are well replaced and abandoned. Also they had these Simplex “Pull Chain” stations that no one knows what they are.
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Those horns look cool
Wow…considering the rarity of most of those devices I sure hope you save them if you get the chance to!
Is photo #22 a key switch?
That’s the aforementioned simplex “ pull chain “ pull stations
Share these photos with OSFA @ oldschoolfirealarms.com! You should donate some of the NATSCO horns to fire museums in the state of Michigan!