he jury of the Grand Prix des Exposants 2025 of the EPHJ Show, including Ms. Irena Milosevic, Associate Professor at HEPIA - Mechanical Engineering, Mr. Eric Rosset, Professor HES-SO, and Mr. Stéphane Cruchaud, Dean of the Geneva Watchmaking School, has selected the following 5 innovations:

1. QUANTUM – Invisible quantum authentication tattoo

Quantum offers a revolutionary authentication solution for the watchmaking industry: a totally invisible quantum “tattoo” applied to watch components. Resistant to light, washing, scratches and temperature, this unique marking makes it possible to prove the authenticity of a part without contact, without energy, and without altering its aesthetics.

2. Ugiel – Nanocoloring by precious metal deposition

Ugiel has developed an innovative technology for grafting gold or silver nanoparticles onto the surface of raw materials, enabling long-lasting color effects to be achieved without the need for pigments, varnishes, paints or chemical treatments. This process modifies the optical properties of the surface on a nanometric scale. It offers a customizable, environmentally-friendly coloring solution on various metals such as titanium, zirconium or steel, for watchmaking, jewelry or industrial applications.

3. LOUIS BÉLET SA – Form threading by polygon turning

A polygon machining solution enabling the most complex thread forms and other shapes to be produced in a matter of seconds, with time savings of up to 97%. Validated in the medical sector, this technology is also perfectly suited to the watchmaking and precision connector industries, with significantly increased productivity.

4. INSTITUT LUMIÈRE MATIÈRE (ILM) – Piezoelectric crystals with complex geometries

The Institut Lumière Matière (iLM), a CNRS-Université Lyon 1 research unit, has developed an ion etching technology for sculpting monocrystalline sapphire or ceramics into novel geometries (spirals, arches, domes). These three-dimensional structures pave the way for new mechanical, optical and electronic devices that are more compact, aesthetic and high-performance.

5. SALIN – Patented system for quick, invisible fastening of metal bracelets

Salin revolutionizes the fastening system for metal bracelets with EasyFix, a patented, invisible device that enables bracelets to be fastened or removed in seconds, without the need for tools. Lightweight, compact and compatible with industrial standards, it meets a growing demand for high-end modularity.