I don't get why this topic is for random sirens.
what that i've read, to me, doesn't seem random at all.
Random to me is finding a 2001-130, then a WPS-3016, then an Eclipse, then a T-128, then a 2T22 all in one cities limits.
And(at least around here) finding a siren with another manufactures controls on the same pole is just odd, not random.
Also, it also depends on when the siren was installed, cause the person in charge at the time, maybe not the same person several years down the road when another new siren is installed.
And budgets are not the same either.