Columbia subject headings:
Clock and watch making--Switzerland--History--19th century.
Clock and watch making--Switzerland--History--20th century.
Harvard subject headings:
Clock and watch making--Switzerland--History--19th century.
Clock and watch making--Switzerland--History--20th century.
Princeton subject headings:
Clock and watch making--Switzerland--History--19th century.
Clock and watch making--Switzerland--History--20th century.