conception, development, manufacturing, production, transformation, optimization, leasing, importation, exportation, purchase, sale, and marketing of components, finished or semi-finished products for the watchmaking, jewelry, and gemstone industries; as well as all similar articles and products, those related to, or used in their manufacturing, transformation, or maintenance; services, consulting, and business opportunities in these fields; importation, exportation, transformation, customization of antique objects; purchase, sale, operation, and management of real estate, excluding all transactions prohibited by the Federal Law of December 16, 1983 on the acquisition of real estate by foreigners (LFAIE).