Physical description
Thirteen page report within Manila covers with a red comb binder, foolscap size titled "Loading / Unloading characteristics Z-class trams, Interim Report", dated July 1975, summarising the findings of experiments at Preston Workshops and studies during June and July 1975. Gives a view on the design of the Z-class design. Includes tables and graphs.
Inscriptions & markings
Marked on top of the front over "Embargoed" and "74/1.5 (part 5 of 5)