At some point, a square horn Hurricane was shipped to a Klaxon dealer in South Africa (Klaxon and ACA were business partners) as a display model, but it's unlikely/unknown if it or any others were actually installed anywhere. I have a saved FB post from someone who knows more about this. I'll find and post it later.
Owner of a 1968 10/12 port 3 signal ACA Allertor 125 and too many mini sirens.