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K&E Polyphase slide rule N-4053-3 - $45

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K&E Polyphase slide rule N-4053-3 1
K&E Polyphase slide rule N-4053-3 1 thumbnailK&E Polyphase slide rule N-4053-3 2 thumbnailK&E Polyphase slide rule N-4053-3 3 thumbnailK&E Polyphase slide rule N-4053-3 4 thumbnailK&E Polyphase slide rule N-4053-3 5 thumbnailK&E Polyphase slide rule N-4053-3 6 thumbnailK&E Polyphase slide rule N-4053-3 7 thumbnailK&E Polyphase slide rule N-4053-3 8 thumbnailK&E Polyphase slide rule N-4053-3 9 thumbnailK&E Polyphase slide rule N-4053-3 10 thumbnail
condition: like new
make / manufacturer: K&E
model name / number: N-4053-3
size / dimensions: 27.3 cm x 34.31 mm x 9.45mm

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The 4053-3 has a robust set of scales designed for rapid calculation, specifically reducing the number of slide inversions:Front Scales: A, B, CI, C, and DRear Scales: S (Sine), L (Logarithm), and T (Tangent)Ruler: The outer edges typically feature inch and metric rulersBack: The back of the rule usually contains a highly detailed U.S. Bureau of Standards conversion and equivalents table

Produced extensively from 1909 to 1967, it features a wood core laminated with white celluloid faces, making it a beloved piece of mid-century engineering and STEM

According to the serial number it was manufactured between 1928-1929 so it’s almost one hundred years old.
It has the leather case and original box

Can meet for exchange

It’s in excellent condition though the box shows wear.

post id: 7939682830

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