From what I can find out it's technically a Smith and Wesson siren under a different name. Smith and Wesson were making emergency vehicle equipment until the '80s when their line was transferred to another company which then became C&V Electronics, who made the CV-100. C&V didn't seem to last that long and were acquired by Premier Hazard in the early '90s which is why it sounds so similar to those sirens.
Take a look at the Smith and Wesson siren box, it's extremely similar, sharing the same dial design and colour scheme. This is the Model 800, it sounds extremely similar too.