Canadian Jewellers Association · Toronto : Maclean-Hunter Pub. Co · leaf 932
, because here even theslightest variation of the temper affects the action of the spring.Supposing the color should be a dark blue, if the mass (springand block, or plates), has been heated rapidly, the coloringmust be stopped sooner, or at a lighter shade, say a purple ora reddish brown ; while… … No. 5. Gilded Movement; thirteenjewels in settings ; expansion bal-ance ; patent regulator. Eighteensize, Stem Winding, Hunting orOpen Face. No. 15.Gilded Movement ; fifteenjewels in settings; expansion bal-ance ; patent regulator ; patentBreguet hair spring, hardenedand tempered in form.…
Jewelry · Jewelry trade
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
