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| The Tetractys was the most complex printing calculator built by Olivetti starting 1956. This is the frontpage of the publicity leaflet, itself an example of Italian modern art. | |
| Total images: 8 | Help | |
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| The Tetractys was the most complex printing calculator built by Olivetti starting 1956. This is the frontpage of the publicity leaflet, itself an example of Italian modern art. | |
| Total images: 8 | Help | |