The Leeds automatic telephone exchange
|Caption||The Leeds automatic telephone exchange. Illustration for Triumphs of Invention by Cyril Hall (Blackie, c 1925).|
|Artist||English Photographer (20th Century)|
|Artwork medium||black and white photograph|
|Copyright notice||© Look and Learn|
|invention inventions technology technological progress Leeds exchange ring automatic telephone subscriber lifts receiver hook pointer dial successive figures number|
|Stock image ref||Sizes available||Views|
Hi-res: 4,864 x 3,289 pixels
Lo-res: 1,216 x 822 pixels
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