Joray Wyss: the unfindable “concentricity tester”
{Appeared in the “Joray & Wyss 80 years” JSH’s Hors-Série}. A little rummaging in the attics of Joray & Wyss history has yielded a unique machine that will delight vintage…
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Le cadran, par le Dr. Helmut CROTT
The work of a lifetime, the book “Le Cadran” by Dr. Helmut Crott (edited by Joël A. Grandjean), the history of the dial in the 20th century, the prestigious history of the Stern dials and of a family that took over the Patek Philippe brand
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