“The Temperature During this laboratory is retained at 21°C along with the humidity at 45 per cent,” points out Sylvain Jeanneret, The person who heads up the 8-powerful team on the Patek Philippe lab in Neuchâtel, from driving his white mask, which is just one part of his head-to-toe covering. https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/