Original and factory sealed factory Mantua MC90 Sagami Can Motor Conversion Kit for Pacific 4-6-2, mikado 2-8-2, Hudson 4-6-4, or decapod 2-10-0. Factory part number was 811. I have included a pic of the original instructions from my shop manual. It requires drilling a hole for the motor bracket screw. All screws, washers, bushings, and mount spacer are included. Power drive gear box is included. These run smooth and quiet. Very nice upgrade for your Tyco pacific or mikado Steam Locomotives too. Feel free to ask questions.