The Swiss Metalworkers' and Watchmakers' Union (German: Schweizerischer Metall- und Uhrenarbeiter Verband, SMUV; French: Fédération suisse des travailleurs de la métallurgie et de l'horlogerie) was a trade union representing workers in the metal and watchmaking industries in Switzerland.
The union grew rapidly during World War I, membership peaking at 85,000 in 1919, but then falling to just 43,000 in 1925.
This was a difficult period for the union, which lost its collective agreements, renounced strikes, and expelled its communist members, but was able to expand unemployment insurance.
[1] Under the long-term leadership of Konrad Ilg, the union began growing again, rapidly after World War II.
[1] By 1998, the union had 95,315 members, of whom 91% worked in the metal industry, and the remainder across a variety of sectors.