The K-8 school I had kindergarten at has an interesting (and LOUD) Simplex fire alarm system, and is the most recent out of any public school I have attended (the system is mostly from 1974, but the main panel is from the 1990s or early 2000s, and is probably a 4005.)
When I went there for kindergarten, the school probably had a Simplex 2001 or 4002 panel, and the alarms were on Slow March Time.
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