The watchmakers' lathe, its use and abuse; a story of the lathe in its various forms, past and present, its construction and proper uses (1903)
Goodrich, Ward L. [from old catalog] · Chicago, Hazlitt & Walker · leaf 87
Fig. 59. … Fig. 60. Fig. 61 shows the Johanson Crown chuck. It consistsof an adjustable center, C, with left-handed thread, a numberof caps,.. A, with varying sizes of holes, to fit the varioussizes of crowns, and the body, B, with right-hand threadfor the caps, so that the center will not run down when…
Clocks and watches · Lathes
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
