Cincinnati 2ML, 2MI and 3MI (Model OM Types OM, 203, 205, 307 & 410) Plain, Universal and Vertical Milling Machines: Superb, very detailed Service Manual and clearly-illustrated Parts Manual with Exploded Assembly Diagrams. PLEASE NOTE: two editions were published - one for the knee without an externally-mounted motor on its right-hand face and another where the motor is built into the knee. Please put into one line of your address "external motor" or "internal motor".