It's a several decade old piece of hardware that was likely produced in extremely limited quantity, so finding the answer to that is probably not going to be ea

It's a several decade old piece of hardware that was likely produced in extremely limited quantity, so finding the answer to that is probably not going to be easy. Presumably it was produced as a promotional item made to promote their GPS receivers for some kind of safety application that the ambulance shape is a reference to, but good luck confirming that in 2023.