Genuine R/H original AP backplate. If the brake adjusters on your front twin-leading brakes have seized up, there is no real repair short of replacing this backplate! For minis from MK2 on - 1968 to 1984 - this is a safety critical part and therefore only Genuine AP original fitment parts are supplied.
If fitting
GWC102 and
GWC103 earlier cylinders you will need to slightly elongate the bolt holes holding the cylinders.