Brother T-8421C Sewing Machine Instruction Manual (Model 8421C/8422C/8452C/8722C/8752C) - 40 Pages. Lost your sewing machine's manual? We've got you covered! This instruction manual is the ultimate guide to unlock the full potential of your Brother T-8421C. No more confusion or frustration—just clear, concise instructions right at your fingertips. What's inside? Everything you need to know from setting up to mastering your sewing machine and all its features.