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For use
in Watchmakers or Clockmakers lathes, known as ww lathes or 8mm lathes,
6mm lathes, 10mm lathes such as made by American Watch Tool Company, Boley,
Boley Leinen, Derbyshire, Levin, Marshall, Peerless, Moseley, Lorch, Webster-Whitcomb,
Waltham, and other lathes with cone bearings.
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