F J Britten's Watch and Clockmakers Handbook DICTIONARY AND Guide.Defines a BOW, "as a thin slip of whalebone or cane used to rotate the mandril of a lathe, a drill or an arbor, by coiling a line attached to its extremities once around a ferrule or pulley on the object rotated; This line, according to the dimensions of the work , is of Gut, Horse Hair,or Human Hair"..... The only one I have ever seen was made of Malacca Cane and had Horse Hair line on it. All the Best . GED.
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