“This innovation is stable, durable, and compatible with the most demanding watchmaking constraints,” continues Composites Busch, a renowned spin-off of Germany’s Busch Vacuum, established in Porrentruy (JU) in 1988.
“This composite material is part of a continuous innovation approach, driven by long-standing expertise in composites applied to haute horlogerie.” It incorporates gold in the form of thin leaves, combined with a mineral fiber weave, all bonded by a bio-based resin.
The quartz fiber-reinforced structure yields a material particularly suited to watchmaking applications. “This technical foundation, perfectly mastered by our teams, offers great creative freedom: variations in gold caratage and tones, plays on depth and light, resin coloration, or the integration of pigments and functional powders depending on aesthetic or technical requirements.”

“A new material: a fully-fledged identity element, evolving and exclusive”
More than an assembly of noble materials, this composite reflects precise craftsmanship, enriched by the expertise of professionals dedicated to research and trend anticipation. “Each watch model results in a specific interpretation, turning the material into a genuine identity element—evolving and exclusive, tailor-made for the brand.”
Joël A. Grandjean / 1876 News Agency
https://compositesbusch.ch
EPHJ, stand N17
Composites Busch, in brief
Based in Porrentruy, the company specializes in the design and manufacture of high value-added composite solutions. Combining technical and creative expertise, Composites Busch is renowned for its bespoke material developments, supporting clients from initial concept through industrialization for innovative, high-demand applications.