http://en.wikipedia.org/wiki/Clockmaker
A clockmaker is an artisan who makes and repairs clocks. Since almost all clocks are now factory-made, most modern clockmakers only repair clocks. Modern clockmakers may be employed by jewellers, antique shops, and places devoted strictly to repairing clocks and watches. Clockmakers must be able to read blueprints and instructions for numerous types of clocks and time pieces that vary from antique clocks to modern time pieces in order to fix and make clocks or watches. The trade requires fine motor coordination as clockmakers must frequently work on devices with small gears and fine machinery.
Originally, clockmakers were master craftsmen who designed and built clocks by hand. Since modern clockmakers are required to repair antique, handmade or one-of-a-kind clocks for which parts are not available, they must have some of the design and fabrication abilities of the original craftsmen. A qualified clockmaker can typically design and make a missing piece for a clock without access to the original component.
Clockmakers generally do not work on watches; the skills and tools required are different enough that watchmaking is a separate field, handled by another specialist, the watchmaker.
Notable clockmakers[edit]
Udo Adelsberger, Germany
John Arnold, United Kingdom
Johann Baptist Beha, Germany
Ferdinand Berthoud, France & Switzerland
Abraham Louis Breguet, France & Switzerland
Achille Brocot, France
Martin Burgess, United Kingdom
Joost Bürgi, Switzerland
Konstantin Chaykin, Russia
William Clement, United Kingdom
Samuel Coster, Netherlands
Aaron Lufkin Dennison, United Kingdom
Giovanni de Dondi, Italy
Richard Donisthorp, United Kingdom
Hans Düringer, Germany
John Ellicott, United Kingdom
George Graham, United Kingdom
John Harrison, United Kingdom
Peter Henlein, Germany
Christiaan Huygens, Netherlands
James Ivory, United Kingdom
Antide Janvier, France
Mikulas of Kadan
Franz Ketterer, Germany
J. B. Joyce & Company, United Kingdom
Johann Andreas Klindworth, Germany
Joseph Knibb, United Kingdom
Jean-Antoine Lépine, France
David Rittenhouse, USA
Pierre LeRoy, France
Jens Olsen, Denmark
Timothy Mason (clockmaker), United Kingdom
William Potts & Sons, United Kingdom
Rasmus Sørnes, Norway
Adolf Scheibe, Germany
Smith of Derby Group, United Kingdom
Eli Terry, USA
Thomas Tompion, United Kingdom
Thwaites & Reed, United Kingdom
Sigmund Riefler, Germany
Benjamin Vulliamy, United Kingdom
Richard of Wallingford, United Kingdom
Simon Willard, USA
John Whitehurst, United Kingdom
Su Song, China
Lazar the Hilandarian, late 14th- and early 15th century Serbia and Russia
David Hare (1774-1842), Scottish philanthropist and pioneer of modern European Education in India
Tim Hunkin (made the London Zoo Clock and the Southwald Water Clock) United Kingdom http://timhunkin.com/