The box contains small good quality photographs, mounted on index cards in numbered bundles for the following categories:

1 - Control

2 - Electronics

3 - Traction Motors

4 - Master Controllers

5 - Equipment

6 - Auxiliary Machines

7 - Mechanical Parts

8 - Transformers

9 - Rectifiers

10 - Works/Manufacture

12 - Gears

13 - Pantographs

14 - Control Desk