Cool! That’s a 4603-9101 annunciator installed onto an annunciator for a Simplex 4208 or 2001 system! I bet their panel is probably a Simplex 4120 or a 4100U. What’s the rest of the system like? I’m willing to bet they have either most of the old stuff intact, or it’s now some kind of voice-evac system or a newer TrueAlert horn/strobe system.
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