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| A vintage sliding rod calculator from 1973 using the HEX system and sold as a programmer's tool. |
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| Total images: 14 | Create web photo albums with Jalbum | Chameleon skin | Help |
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| A vintage sliding rod calculator from 1973 using the HEX system and sold as a programmer's tool. |
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| Total images: 14 | Create web photo albums with Jalbum | Chameleon skin | Help |