“The Temperature In this particular laboratory is retained at 21°C plus the humidity at 45 per cent,” points out Sylvain Jeanneret, The person who heads up the eight-strong crew on 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/