My local library used to have a Simplex 4002 with 2901-9838 horns on 4903-9105 strobe plates. Last year, they remodeled the entire library and added an addition. They replaced the system with a new addressable Siemens FA panel (I don’t know what kind). This is not surprising as Siemens is being used on almost all new systems in my area. The signals are rebranded wall mounted Wheelock led3 horn/strobes and remote strobes. There are also addressable Siemens smoke and heat detectors.