


And to Charles, if you see this, any chance you could get up there in the near future to confirm my suspicion, and maybe a few more pictures and angles? To my knowledge, Denver only had horizontal sirens up until Hendrie & Bolthoff MFG and Supply sold the patent to Sterling sometime in the early to mid 1920's in which it was no longer known as a "Denver" siren
SOLVED. Thanks to Facebook user Aaron Allevato the siren in question has been determined to be a Pearse Company siren, a manufacturer based out of Denver Colorado. See pictures further in thread.