Two vintage Yard-O-Led hallmarked silver mechanical pencils,…
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Two vintage Yard-O-Led hallmarked silver mechanical pencils, hexagonal and round, both with engine turned decoration, patent no. 422767, hallmarked JM & Co. London 1946 & 1947, total wt. 42.55g.

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  • Engine Turned - Engine turning is a decorative technique used on metal surfaces to create intricate curving or geometric pattern. The process involves cutting a series of lines into the surface of the metal using a rose engine or decoration lathe which rotates the metal as it cuts, allowing the operator to create a repeating pattern that covers the entire surface. The resulting surface has a shimmering, reflective quality that is often described as "engine turned." Where an engine turned item has been enamelled, the term used to describe the decoration is usually guilloche.

    Engine turning was originally developed to decorate metal objects such as firearms, scientific instruments, and other metal objects that required precise and elegant design.

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