“The Temperature in this laboratory is kept at 21°C and the humidity at forty five for every cent,” describes Sylvain Jeanneret, The person who heads up the eight-potent staff in the Patek Philippe lab in Neuchâtel, from driving his white mask, which is just one part of his head-to-toe masking. https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/