“The Temperature in this laboratory is retained at 21°C along with the humidity at 45 for each cent,” explains Sylvain Jeanneret, The person who heads up the eight-strong staff on the Patek Philippe lab in Neuchâtel, from behind his white mask, which is only one Element of his head-to-toe covering. https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/