The drawer contains c 2700 aperture cards of drawings of components for traction motors, motor generators and auxiliary generators. Drawing number ranges are C4051001 - C4055459; C4021000 - C4022999; C4052301 - C4052999; C4053500 - C4054400. Samples are below:

C4051001 - C4052300 - MV157 motor

C4054400 - C4055000 - Spring and endplate

C4055311 - C4055459 - Cover and Armature Assembly MD79A

C4021001 – Housing: Driving End AG6

C4022000 - Fan Diaphragm & Blades

C4022999 - A2725 Railway Motor

C4052301 - AEI186: Part Brush Holder Assembly

C4052999 - AEI137: Compole Tapping Block and Stud