(The GP300 or whatever it is speaker mic is a seperate, irrelevant item, unless someone wants to buy it from me. Its cable is just stuck under the handset.)
Having never seen one of these, I figured it'd be a cool collectors' item, even if it never works on one of my radios.
Has anyone ever used one of these before, or does anyone know anything about it? I'm guessing it's from an ex SA Government radio - they've got LOTS of strange SP gear.