Brake drum and sprocket, 5/8 inch x 1/4 inch, suit all Norton models (featherbed and brazed frame) with full width hub up to 1965, 43 teeth, 1/4in wide. Made in England cast into the drum, beautifully made, very high quality. Original part number: K12-2/463; 18233; 50245 - Rear brake drum and sprocket
