The roll contains nine waxed linen drawings by British Railways Locomotive Drawing Office, Brighton of electro-diesel locomotive mechanical parts including cab arrangements. Drawing numbers W.12735; W.13030; W.13022; W.13157; W.13142; W.13213; W.13589; W.13693; W.13699.

Class 73/0. Body side members. Class 73/1. Floor supports . Stretcher over the bogie. Arrangement of the cab partitions.