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purpose lead diameter mechanism composition variations production date origin |
marking 1/2 in. twist lock clutch wooden barrel, metal clamp ring, plastic cap none (1930s) to (present) USA |
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| see also |
Charles Bruning Co. catalog, 1952, p 230 Lyra Lumber Crayon Holder |
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| original content, images, layout and design © 2001 to 2010 Dennis B. Smith | more info... | ▲ top | ||
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