It appears to be a Federal EP-1, Sireno M1 or similar. Each was in the mid-price range. Sireno's was painted or chrome-plated; Federal didn't offer a painted version. Federal's occasionally appear on eBay. They were touted in the 1949 catalog as being "For those who want a siren that looks like a siren." A smaller version was made by Sterling beginning in the 19-teens. The thought (though not stated in print by the manufacturer) was that the wide opening on the front - the projector - would help propel sound farther forward. The fact is that the sound comes from the rotors, behind the projector, and the projector's contribution, if any, was to introduce more air into the rotor/stator assembly. Federal said in their 1972 catalog, "Whether a projector (which is actually the intake) makes it a better performer or not (we believe it helps) here it is. Although losing ground in popularity to streamlined versions, there are many 'die-hards' who will consider no other." They faded from view not long after as sales of their "Q," and B&M's "Siro-Drift" and "S-8" continued, with electronic sirens dominating the market. Glad to email photos of any.
