“Chronoswiss is the only brand with color-shifting, handmade guilloché. And you cannot simulate this effect in any way – you simply have to experiment,” says Chronoswiss head of design Maik Panziera. After months of testing a plethora of treatments, coloring agents, lacquers, finishes, patterns and materials, the most stunning result came from a secret, unique type of nano-decorative chemical vapor deposition. The relentless experimenting also led to the conclusion that the light reflection achieved with a short-wave guilloché pattern executed by hand in the Lucerne atelier was fundamental to achieving this mesmerizing effect. “When the prototype finally came back from the lab, I instantly thought of the Paraiba tourmaline, one of the world’s rarest gemstones unique to the north-eastern Brazilian state,” continues Panziera, who was goldsmith for two decades before switching to watches.