That one 9838 sure has seen better days hasn’t it? (nice to see such a vintage system still in service though regardless)
It does! Wonder how it ended up with such an interesting combination of devices (wouldn’t surprise me if the SHGs are original to the system since I believe Gentex devices were commonly installed with Silent Knight panels, at least up until Honeywell acquired the latter: then they started being installed with System Sensor signals instead since Honeywell owns SS too).
Going by the SK-5235 the panel is likely an SK-5208 as that’s supposedly the only panel the former is meant to be used with.
Does that place have any automatic detectors to speak of? (sprinklers too?)