Lima OO gauge armatures as used in the "G" motor. Everything except the class 20 and 67 diesels which had can motors.
Lima 00 Armature Class 66/King/31/47/37/43 and Others
Airfix OO BR Class 31 Diesel Brush Type 2 Spare 5-Pole Motor Armature - Working
HORNBY DUBLO 37mm UNUSED REWOUND 0-6-2 MOTOR ARMATURE. FOR SPARES. LOT 12