Swiss watchmaking

• Ulysse Breting (La Locle, Switzerland) pivoted detent chronometer with helical balance spring, circa 1860.
  Modified by adding keyless winding on the barrel bridge.

Anon: "Some Notes on P.F. Ingold" (1932)

Biography and discussion of Ingold's machinery.

Berner and Audetat: "Pierre Frederic Ingold 1787-1878" (1962)

Biography of Ingold.

Bernoulli: "Map of Neuchatel and Valangin" (1783)

A large map of the main watchmaking regions in Switzerland. See also Osterwald.

Buffat: "History and Design of the Roskopf Watch" (1914)

A detailed study of the Roskopf watch.

Buffat: "Historique et Technique de la Montre Roskopf" (1914)

Detailed French study of the Roskopf watch.

Francillon: "History of Longines" (1947)

History of the Longines watch company.

Osterwald: "Description of the Mountains and Valleys of Neuchatel and Valangin" (1766)

Diary of a trip in Switzerland with some references to watchmaking.

Osterwald: "Description des montagnes et des vallees qui font partie de la principaute de Neuchatel et Valangin" (1766)

French diary of a trip in Switzerland with some references to watchmaking.

Saturday Magazine: "Manufacture of Watches in Switzerland" (1842)

Interesting because of its description of watch smuggling.

Watkins: "Philipe DuBois & Fils, Customers, Suppliers and Bankers, 1757 - 1824" (2014)

A data base of people who dealt with Philipe DuBois. Available as a FileMaker Pro data base and as Excel files.

Illustration: Ulysse Breting (La Locle, Switzerland) pivoted detent chronometer with helical balance spring, circa 1860.
Modified by add class="index"ing keyless winding on the barrel bridge.