| Sub-Type | Slide Rules |
|---|---|
| Type | Engineering/ Surveying |
| Period | 1951 to Present |
| Material | wood and plastic |
| Country of Origin | United Kingdom |
Check the listing for details. Unique Universal Slide Rule with Box Vintage Collectable VGC. Condition: Used, Made in United Kingdom. Listed at 21.67 USD. This is a vintage Unique brand slide rule in its original burgundy and white cardboard box. Slide rules are mechanical analog computers used primarily for multiplication and division, as well as functions such as roots, logarithms, and trigonometry. This specific example was made in England, as indicated by the text on the rule itself. Unique slide rules are known for their wood construction with celluloid-covered paper scales. They were widely used by engineers and students before electronic calculators became prevalent in the 1970s.
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