Question: In what country is the watch company which owned the Hamilton Watch Complex based?

Context paragraphs:
Hamilton Watch Company: The Hamilton Watch Company is a brand of the Swatch Group, a Swiss watch company based in Bienne, Switzerland.  The Hamilton Watch Company had its genesis as an American watch design and manufacturing company, which incorporated in 1892 and produced its first watch in 1893.

Invicta Watch Group: Invicta Watch Group is an American watch company.  The company trades on the name "Invicta Watch Company" and is marketed by Clay Greenwood of Utah.  Invicta was a company founded in 1837 by Raphael Picard in La Chaux-de-Fonds, Switzerland.  The Picard family had owned and operated the company which produced Swiss mechanical timepieces until the quartz movement revolution of the early 1970s.

Waltham Watch Company: The Waltham Watch Company, also known as the American Waltham Watch Co. and the American Watch Co., produced about 40 million watches, clocks, speedometers, compasses, time fuses, and other precision instruments between 1850 and 1957.  The company's historic 19th-century manufacturing facilities in Waltham, Massachusetts have been preserved as the American Waltham Watch Company Historic District.

Waltham Model 1857: The Waltham Model 1857 is a watch made by the American Watch Company, later called the Waltham Watch Company in Waltham, Massachusetts.

Barrington Griffiths Watch Company: The Barrington Griffiths Watch Company, based in Calgary, Alberta, Canada, is a designer and manufacturer of limited edition wristwatches using recycled Swiss movements.  The design of their "Modern Classic" watch was inspired by the 1940s mechanical movement used in its construction.  The Barrington Griffiths Watch Company is one of only a few companies making wristwatches in Canada.  Although they use movements of Swiss origin, the components of the case are made in Canada, and the watch itself is assembled in Canada, satisfying the Canadian Competition Bureau's requirements for a "Made in Canada" product.

Hamilton Watch Complex: The Hamilton Watch Complex is a former industrial complex in Lancaster, Pennsylvania.  It was owned by the Hamilton Watch Company and was used as their headquarters from the company's founding in 1892, until 1980.  The complex was listed on the National Register of Historic Places in 1982.  The main building was converted into a luxury apartment and condominium complex.

Elgin National Watch Company: The Elgin National Watch Company, commonly known as Elgin Watch Company, was a major US watch maker from 1864 to 1968.  The company sold watches under the names Elgin, Lord Elgin, and Lady Elgin.

United States Watch Company: The United States Watch Company is a historic factory complex at 260 Charles Street in Waltham, Massachusetts.  Built in 1886 and enlarged in 1901, it represents one of the most successful spinoffs of the American Waltham Watch Company, Waltham's dominant watchmaker of the late 19th century.  When the complex was listed on the National Register of Historic Places in 1989, it was the last watch factory left in the city.

Elgin National Watch Company Observatory: The Elgin National Watch Company Observatory is a historic building in Elgin, in the U.S. state of Illinois.  It was built in 1910 to serve the Elgin National Watch Company two blocks to the west.  The two-story observatory provided data on time that was scientifically accurate to a tenth of a second.  Manufacturers could then produce a more accurate watch.  The observatory was an important part of the company's legacy, and they even changed their motto to reflect this.  By 1950, the Elgin National Watch Company could no longer compete with wristwatch companies.  The observatory was donated to a local school district and became known as the School District U-46 Planetarium/Observatory.  The building was added to the National Register of Historic Places in 1994.

American Waltham Watch Company Historic District: The American Waltham Watch Company Historic District encompasses the former factory of the Waltham Watch Company, the leading American watch manufacturer of the 19th century and the city's largest employer.  Located on Crescent Street and the banks of the Charles River, the surviving elements of its manufacturing facility date from the 1870s to the 1910s, and include particularly fine industrial Romanesque architecture.  The buildings have been converted to a variety of commercial, industrial and residential uses since they ceased being used for watchmaking in the 1950s.  The complex was listed on the National Register of Historic Places in 1989.

Supporting paragraphs: Hamilton Watch Complex Hamilton Watch Company
Answer: Switzerland