Dual outlet master cylinder for Split type braking systems.
Late Australian Minis and Mokes had a dual brake system of some sort and earlier cars had GMC168 master with "imperial" fittings. This unit has metric unions. Fitted from late '70s to 1980 you can change the brake pipe ends to metric if required.
NOTE: DOES NOT COME WITH THE SWITCH - HAS A BLANKING BOLT FITTED