Check the listing for details. Vintage 10 inch Slide, Engineering Instruments, Inc., Used Condition. Condition: Used. Listed at 8.99 USD. The product is a vintage 10 inch slide rule from Engineering Instruments, Inc. This collectible item falls under the category of Science & Medicine (1930-Now) specifically in the Engineering section. Slide rules were commonly used for various calculations in engineering, mathematics, and other fields before the advent of modern electronic calculators. The 10 inch size suggests that this particular slide rule may have been designed for precision and accuracy in large-scale calculations.
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