Louis Lang SA manufactures watch cases in Porrentruy for the watch and jewellery industry – from stamping and machining through to assembly.
Louis Lang SA
Porrentruy (CH)New on Amplifa
About Louis Lang SA
Louis Lang SA is a company founded in 1887 by Louis Lang in Porrentruy, in the Swiss Jura, a region with a long watchmaking tradition, and has been family-owned and run for several generations. The company manufactures high-quality watch cases and works confidentially with leading watch and jewellery houses, which are not named. The value chain includes stamping (Étampage), machining (Usinage), mechanical polishing, hand polishing, Visitage (case final inspection) as well as assembly, thereby covering the entire production chain of case making. In doing so, the company combines traditional craftsmanship with modern technology; automation and technical positions are also actively filled. Beyond manufacturing, Louis Lang SA is committed to training apprentices and to the continuing education of its employees. With measures such as a water treatment system in the polishing area, a photovoltaic system with over 700 panels and heat recovery, the company also pursues a sustainable production approach.
- Site
- Porrentruy
- Processes
- Étampage (stamping/pressing), Usinage (machining/turning), Polissage mécanisé (mechanical polishing), Polissage manuel (hand polishing), Visitage (case assembly final inspection), Assembly, Pressing (Étampage), CNC machining (Usinage)
- Materials
- Stamping/Forming, Machining, Mechanical Polishing, Hand Polishing, Case Final Inspection/Assembly
- Founded
- 1887
- Industries
- Watchmaking industry, Jewellery/gemstone industry
- 01
Stamping (Étampage)
- 02
Machining (Usinage)
- 03
Mechanical polishing
- 04
Hand polishing
- 05
Visitage
- 06
Assembly
Processes and Manufacturing
Stamping/Forming
Forming process for the manufacture of case components for watches.
Machining
Subtractive machining of case parts with high precision.
Mechanical Polishing
Machine polishing of case surfaces.
Hand Polishing
Handcrafted surface finishing of the highest quality.
Case Final Inspection/Assembly
Completion and quality control of the assembled watch cases.
Site
Porrentruy
CHHeadquarters and production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Étampage (stamping/pressing)Forming | – | – | – | – | – |
| Usinage (machining/turning)Machining | – | – | – | – | – |
| Polissage mécanisé (mechanical polishing)Surface | – | – | – | – | – |
| Polissage manuel (hand polishing)Surface | – | – | – | – | – |
| Visitage (case assembly final inspection)Assembly | – | – | – | – | – |
| AssemblyAssembly | – | – | – | – | – |
Additional services
Reference customers
History
- 1887
Founded by Louis Lang in Porrentruy; a family business over several generations ever since.