Thread: Ivory or bone ?
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Old 20th June 2016, 04:36 PM   #4
Sajen
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Location: Germany, Dortmund
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Colin refer to the Schreger lines. But I've seen a similar dagger with an early sort of plastic which imitates this Schreger lines. Can you use the hot needle test at an unvisible place?

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Detlef
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