Physical description
Report - 7 quarto typed sheets - untitled, but gives a detailed description of the design basis and construction of the SW6 class tram. Dated May 1939. Details the design after Bell's overseas trip the previous year.
Details dimensions, seating, ventilation, seating, doors, structure, construct, timber, materials, door engines, cab equipment, PA system, interior appearances, flooring, colours, lighting, conductor's bell / signals, trucks, bolster, wheels, brake shoes, braking, motors, acceleration, performance, controllers, contactors, compressor. Gives a detailed list of the specifications.
Inscriptions & markings
Has a note in pencil about a typographical error on the bottom of the sheet.