After graduating in 1989 from the IULM University of Milan, Mara Cappelletti attended the 'History of Jewelry' course and the 'Art of Islamic countries, India, China, Korea and Japan' short course at the Sotheby's Institute of Art in 2005. She is founder and president of Associazione Culturale Stile e Storia, working in art, fashion and jewellery. From 2011-2012, Cappelletti was the curator and author, together with Osvaldo Patrizzi, of The Masters of Time (24 Ore Cultura): a collection of 25 monographs dedicated to the world's finest watchmakers and founders of the greatest Maisons. In January 2020, Cappelletti was the main curator of the exhibition Stile Milano (Milano Style). She had previously curated 2015 exhibition Jewels Of Taste as part of the Expo In Citta, supported by the University of Milano, Associazione Orafa Lombarda, and The World Jewellery Confederation CIBJO.// Osvaldo Patrizzi has held a long fascination with horology. He served as an apprentice watchmaker in Milan from 1965-1973, before being employed as a restorer of antique watches. He went on to become an Expert of the italian Association of Antique Horology Dealers and a consultant for the Swiss Custom. He founded the Galerie d'Horlogerie Ancienne, which became Antiquorum in 1981. In 2007, he founded PATRIZZI & CO. AUCTIONEERS. Across the course of his long and illustrious career, Patrizzi has been responsible for selling over 75% of all the watches ever sold for over one million dollars. His 'Grading System' is the most reliable way for collectors to gauge the condition of their prospective investments.