Go back to article: Oramics to electronica: investigating lay understandings of the history of technology through a participatory project

Figure 3

A post Office heavy-duty 25-point 6-level uniselectorof metal construction

A post Office heavy-duty 25-point 6-level uniselector (1930), of a similar type to that used by Peter Zinovieff as a crude electromechanical sequencer.