Check this out; someone with a whole binder of Gamewell manuals posted this on Facebook…
This is that rare Gamewell light plate I first saw an example of ten years ago and didn’t find anything else about until recently. The default flush-mount model as seen here is model number M1740. Given how the light only operated on AC voltage even when used with DC horns (just like the Simplex 4040-60), it’s possible Gamewell first introduced that light plate in the late 1960s (when Simplex introduced theirs). After all, the ones I had seen at a school built in 1971 had the old “Bliss-Gamewell” logo on them (Gamewell was acquired by Gulf + Western around 1970)…
Even if they had SpectrAlert Classics slapped onto them. So until this week, I had no idea what they were like with the original horns, and now I know! It seems like Gamewell was copying Simplex’s light plates, given the very similar design and colors. I suspect these were discontinued around the mid-to-late 1970s, when Gamewell switched to using Space Age Electronics’s light plates.