Frederique Constant SA is a Swiss manufacture of luxury wristwatches based in Plan-les-Ouates, Geneva. It was acquired in 2016 by Citizen Holdings of Tokyo, Japan. The company was established in 1988 by Peter Stas and Aletta Stas-Bax (a Dutch married couple).The company was founded in 1988 by Aletta Francoise Frederique Stas-Bax and Peter Constant Stas (a Dutch married couple). Its name is derived from the names of great-grandparents of each founder – specifically Frédérique Schreiner and Constant Stas , the latter of whom founded a company producing watch dials in 1904.
Frederique Constant offers 15 manufacture (in-house) movements in addition to their mainstream line of ETA-powered watches. The high-end handwinding FC-910 caliber, introduced in 2004, was joined by Tourbillon in 2008 and a mainstream FC-7xx caliber range in 2009. The addition of the second-generation manufacture movements makes the company unusual in offering a complete in-house watch.