This view of some of the intricate mechanism of the automatic telephone exchange shows the group selectors. They click round and seek out the required groups, anything from 12 to 47, with human accuracy.
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https://paperspast.natlib.govt.nz/newspapers/SUNAK19281208.2.163.5
Bibliographic details
Sun (Auckland), Volume II, Issue 532, 8 December 1928, Page 17
Word Count
34This view of some of the intricate mechanism of the automatic telephone exchange shows the group selectors. They click round and seek out the required groups, anything from 12 to 47, with human accuracy. Sun (Auckland), Volume II, Issue 532, 8 December 1928, Page 17
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