“The Temperature On this laboratory is kept at 21°C plus the humidity at forty five per cent,” points out Sylvain Jeanneret, the man who heads up the 8-powerful workforce at the Patek Philippe lab in Neuchâtel, from behind his white mask, which is only one Component of his head-to-toe covering. https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/