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Aristo Nr. 970 Linear slide rule
2004.010.0678
Aristo
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Aristo Nr. 698 Studio slide rule
2010.018.006
Aristo
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Aristo 301 "Junior" classroom demonstration linear slide rule
2013.013.011
Aristo
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Aristo Junior Overhead Projection linear slide rule
2013.013.048
Aristo
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