The box is listed by group or set of negatives with several different number series. A sample photo from each bundle:

EP/6000 (21-01-69) – EP/6099 (Sept 1973) - EP/6038, A commutator on a traction motor armature

EP/7000 (Sept 1973) – EP/7099 (01-04-76) - EP/7053, 75mm negative – Tyneside EMU Equipment Cases.

EP/8000 (08-04-76) – EP/8150 (14-05-80) - EP/8099, G350 Induction Motor (first GEC prototype induction motor)

PT/W68 to PT/W71 – 68/1-28; 69/1-7; 70/1-8; 71/1-18 - PT/W69/2, Motor Test area in Preston Works

A; B; DSM; GA; M; OA; P; RWS; T; TCD; V; TW76 /70-174; TW76/270; SL; P/C 2444; PSC 349 – 355