Early Sterling sirens that resembled Denvers

[LukeH]

Could that possibly be a prototype Quadruplex, just adding on shrouds simmilar to that of a Sterlng M??

Or possibly a prototype to the M series

Both wrong. It's called a Super Quad, a 12-horsepower siren fire alarm, a variant of the model M. It has four rotors unlike most sirens. It's very rare because of its high maintenance

Yeah, great job bumping a 7 year old post to incorectly tell us how wrong we are.

FYI, these sirens were produced by Interstate Machine Products begining in 1916, and discontinued in 1918 in favor of the infamous Model M released in 1917. The 12HP superquad wasn't released until 1926, and it's reasoning for it's rarity today had nothing to do with maintenance. They're rare because they were ridiculously expensive for very little benefit over the traditional Model M.

[0zunth]

holy, this might be one of the worst bumps i’ve ever seen…