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Vintage Lawrence Engineering Slide Rule with Original Leather Case - $40
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The Instrument:
Brand: Lawrence – A respected American manufacturer.
Type: A standard engineering slide rule featuring multiple logarithmic scales (A, B, C, D, K, etc.) for multiplication, division, squares, cubes, and trigonometry.
Cursor: Equipped with a plastic cursor with a brass frame and hairline for accurate reading.
Construction: Made of ivory-laminated wood or plastic with precisely printed scales.
The Case:
Material: Original black leather.
Embossing: Clearly stamped with "LAWRENCE SLIDE RULE" on the front.
Condition: The case shows honest wear, scuffs, and a nice patina but is fully intact and functional. The slide rule is in very good vintage condition. The scales are clean, legible, and unfaded. The slide moves smoothly, and the cursor travels without sticking. There is no warping or damage. It is fully functional as a calculating device and a superb display piece.
Historical & Collector Significance:
Obsolete Technology: Represents the pinnacle of analog computation. Using it requires skill and understanding of logarithms, making it a symbol of a lost technical art.
Engineering Artifact: A must-have for collectors of scientific instruments, engineering tools, or 20th-century technology.
Display & Conversation Piece: Its elegant design and historical importance make it a fascinating item for a desk, bookshelf, or studio.
A beautifully preserved, functional piece of intellectual history from the slide rule era. Perfect for the collector, retired engineer, or anyone who appreciates the elegance of mechanical calculation.