Set Includes (1 Of) 11 Teeth Brass Spur, (2 Of) 33 Teeth Gear's, (2 Of) 40T/10T Teeth Plastic Gears, (1 Of) Gear Retaining Plate. Set Is For The Hornby 3 Pole Ringfield. As Shown On Hornby Service Sheet's 104, 87A Produced In The Mid 1977 Used In R063, R065, R066, R078, R842 R840.