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| courtesy Russel Erwin collection | |
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purpose lead diameter mechanism composition variations production date origin |
sketching apprx. 2 mm to 4 mm hexagonal friction slide clutch ebony barrel with sterling silver(?) fittings degree imprint on nosepiece: F, M, B, BB, ? (circa 1910) England |
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| special features | very unusual hexagonal lead and sliding friction mechanism | ||


| original content, images, layout and design © 2001 to 2010 Dennis B. Smith | more info... | ▲ top | ||