Tissot was founded by Charles-Felicien Tissot and his son Charles-Emile who established the Tissot factory in the city of Le Locle. Tissot introduced the first mass-produced pocket watch in 1853 and the first anti-magnetic watch in 1929-30. The Tissot company was also the first to make a watch out of plastic, mother of pearl, wood (the Wood watch) and stone (the Rock watch). Tissot merged with the Omega watch making family in 1930 and Tissot-Omega watches from this era are sought after by collectors.