Actually, looking at it, the various siren codes don't appear to be for any particular model or supplier, but instead indicate a *class* of sirens, based on output levels, as shown on the first page--Code 611 would be any siren under 100dB at 100 feet, 612 would be any from 100 to 104, 613 would be 105-109, and so on up to Code 619 being for 135dB and above (i.e., P-50s and Chryslers). My guess is that Code 625 would be a catchall for various "nonstandard" warning devices like horns and coded sirens, while electronic sirens aren't even coded, with only two locations using them (the "voice sound" installation in San Mateo, CA, and the Altec-Lansing "voice sound" system in Salina, KS).
This makes a certain degree of sense; the cover indicates that this was intended to provide "warning coverage" information, and the various siren codes show 70, 80, and 90dB radii and areas for both 10dB and 12dB attenuation environments, implying it's meant more as a planning document of some sort. I also wouldn't be surprised if it turned out that, rather than FEMA's matching funds procedure, OCD made things simpler in those days before widespread accounting computers by just finding out what an average cost would be for sirens in each code class, and using that to set a single standard matching grant for each siren in a given code. It would DEFINITELY be simpler to do with 1964 accounting technology, and much quicker, too, given the volume of grants they'd given out under the program.
Of course, this doesn't explain why Battle Creek, MI, is listed as having gotten four 615s and two 617s. The 617s are simple; 1000Ts fit firmly into that code, and Battle Creek has three of them (all 4/5-port models at that!); it's entirely possible that only two had been bought as of 1964, or that only two of them were bought with matching funds. The big question is why there are four 615s listed; up until the 80s, the rest of the City's system consisted of SD10s, which *should,* on volume, be classified as 614s. Either that, or there was a period when FS lied up on the SD10's output (from 109dB, it wouldn't take much).
(And for the interested, the 1980s saw the temporary addition of the old Battle Creek Township sirens after the annexation; those being mainly fire sirens for the township FD, they were soon retired. A couple of EOWS-612s went in in the mid-80s down in the part of the former Township that was outside the coverage radius of the old City system, and an RSH-10 apparently replaced one of the SD10s at some point before ATI started selling the HPSS16R that's been the city's standard for new installations and failed-siren replacements since. There was also a 1000 or 1000T at the Air National Guard base, since replaced by a pair of Modulator 4016s located about half a mile apart on the base, but that was never part of the City system, was owned by the Michigan ANG, and, as such, didn't qualify for matching funds from the OCD.)
Edit: Also, when I saw "Federal Tri-Tone" listed there, I found myself picturing a three-rotor job--perhaps a 4/5/6-port Thunderbolt or an XT36? (I think that's right--XT22 comes from it being 10/12-port, right?) Somehow, I have my doubts as to whether that's what they meant...
Edit 2: There's also some real head-scratchers on there. Like, for example, Beaver Falls, PA. Population 16,240, listed as having gotten matching funds for *nineteen* Code 619 sirens. What the heck did they need that much sound power for--did they think they could use the massed sirens to shoot down incoming Soviet bombers? Pittsburgh's ten 619s might be overkill given population, but considering how much heavy industry there was in that city at the time, you might need them to overcome high ambient noise levels, but I can't see how Beaver Falls could use that excuse, either. Smells fishy, like someone had his fingers in the till. :think: Similar for South Saint Paul, MN, getting seven 617s and two 619s along with a 613 and a 615, all for a population of 22,032. Or Bell, CA, with thirteen 619s for a population of 19,450.
I also find it amusing that New York City, the place that Chrysler originally designed its first siren for, elected not to get any 619s, but instead seemingly just deployed 613s at every fire station in the City.
I'm also amused just how many small municipalities in the heart of Tornado Alley were buying sirens like crazy under this program. It makes me think they were already lobbying OCD by 1960 to let them use them for severe weather warnings, too.
Beyond that, I suspect there are few, if any, STHes, STLs, or other single-tone sirens here; wasn't one of OCD's requirements for matching funds that they buy dual-tone sirens, so that they wouldn't be mistaken for the then-common single-tone fire sirens?