Physical description
Folder - blue covers, foldback clips containing technical information on Metropolitan Vickers, "Cam Operated Contact Type Tramcar Controllers" dated July 1936, and given number Q.69975. Gives a general description of the equipment, sizes available, types, small and large controllers, enclosures, regenerative controllers, circuit breakers, notching regulator, air brake attachment and line switch attachment, along photographs of the equipment, construction specifications, for the OK38B. Also includes outline drawings. Folder includes four folder blueprints of wiring diagrams - note these have not be scanned.
Inscriptions & markings
"Spare / 102" on front cover in ink and date stamp "2 July 1936" on many of the documents.
