Push Button Starter Solenoid 12V Volt For Inertia Type Starter Motors. 

This Allows Push Button Operation Of Starter From Under Bonnet To Allow Easier Adjustment Of Tappets ETC .

Original equipment on many early British vehicles [ MORRIS / MINI  / TR2 - 3 / MGA / EARLY MGB / SPRITE / MIDGET ETC Can be used as direct replacement on all Spitfires / GT / Midget etc .