Louis Erard and Vianney Halter give the regulator an unmistakable signature

Louis Erard’s collaboration with Vianney Halter gives the regulator format a strong individual character. Hours, minutes and seconds occupy separate axes, with blued-steel hands and stepped silver-and-grey surfaces creating depth. The crenellated crown recalls the industrial vocabulary associated with Halter’s own watches, while the overall layout remains unusually clear.

Reference 85237AA51 uses the automatic Sellita SW266-1, with an approximately 38-hour power reserve. Its 42mm steel case has a sapphire crystal, an exhibition back and 50-metre water resistance. The 178-piece edition is paired with an Oceania-blue nubuck strap, bringing an independent watchmaker’s design language into Louis Erard’s collaboration programme.