Rare Smoke Detectors

[Randomnicious]

Rare Variant of Kidde/Nighthawk KN-COSM-B?

[s0305749_sc7] [nighthawk-900-0102-04-combination-smoke-and-carbon-monoxide-alarm-8636810] I remember seeing these images on the internet of these and now that I look back, I realized that I have never seen them on YouTube or in any other media format besides these images. Nobody has actually found one of these in real life. The alarm in question has the same features as any other KN-COSM-B, however the interesting thing here is the fact that there is no embroidered lettering on the test but…