Vintage Slide Rules & Cases
This lot comprises two vintage slide rules, accompanied by their original cases. One is a wooden slide rule, likely British made, showing wear consistent with age and use. The second is a Diwa Denmark duplex slide rule, featuring a more complex scale arrangement and a metal body. Both rules represent examples of pre-digital calculation tools, favoured by engineers, scientists, and mathematicians.
Condition & Collectibility
The slide rules exhibit signs of previous use, including surface wear, minor scratches, and fading to the scales. The wooden case shows wear and some loss to the red covering. The leather case for the Diwa rule is worn but intact. These imperfections are typical for items of this age and add to their character. Collectors and enthusiasts will appreciate these examples of early computing technology, representing a fascinating piece of engineering history.
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