Linear slide rules

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Faber Castell 52/82, 10"

Faber Castell Slide Rule 52/82 "Duplo", made in Switzerland, with 15 page instruction booklet. This was a very popular work horse right up to the end of the slide rule era. It is the same model I used in first year engineering.

D Scale length: 250 mm. Significant digits: 3 to 4.

Copyright 2012, Dave Hoyer.