Rear brake lever suit Norton models where lever points up eg rigid model c1933 to 1946, cast steel. Raw condition, the slot for the cam will slight adjustment with a small file. Norton used the same part number in the parts books for all brake cam arms post war eg rigid , plunger and swing arm until they corrected it circa 1954 but there are 3 distinct levers.
Original part number:
3400; A2/469; 10884 - rear hub brake cam lever