April 24, 2024
Otis King Calculator Model L with leather case, box and instructions 1967
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Otis kings patent 183723 Model L calculator X 7653 in excellent 'as new' condition throughout, The model L adds a linearly divided scale section on the top, instead of two decades of logarithmically divided scale. A linear scale on a slide rule is used to find logs and anti-logs, which can be used along with multiplication and division to do arbitrary powers and roots. The bottom scale for model L is usually scale 429, with 430 on top and these are present on this calculator, box matches calculator number as shown and is in very good condition, instructions are also present in excellent condition with some colour transfer from the leather case which is also in excellent condition and this is stamped in gold lettering SHELL TANKERS (UK) LIMITED. J.M LARDNER, ENGINEER APPRENTICE 1967 very collectable.
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