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Slide Rule Faber Castell Novo Duplex 62/83 — Robert's collection of antique scientific instruments, curiosa and scales
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Computer Museum at the University of Waterloo : physical object : Faber Castell 2/83 Novo Duplex [2018.10.4]
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Faber-Castell duplex slide rule, front side. 1960s. Faber-Castell 19 Faber- Castell 2-83N-front Stock Photo - Alamy
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