The roll contains c 40 waxed linen and ozalid drawings by British Railways Locomotive Drawing Office, Brighton of mechanical parts including arrangements of removable translucent glass and fibre doors, brackets and air ducts for electro-diesel locomotives. Drawing number range W.11593 - 12999.

Class 24. Windows. Class 33. Various covers. Class 71. Ducting. Class 73/0. Handbrakes. Class 73/1. Mesh covers. B4. Roof details. B4 and B5 bogies.