This SPEEDOMETER assembly utilises four Bulb(12v3.4w,t10)(s) - the highest specified component.
Parts such as the Speedometer: Bulb(12v1.7w,t10,wb121), Screw(2x6), Washer,lock, Case,meter are included in the Sp600 1985 (f) Usa (e03) Speedometer parts fiche.