https://www.bestluxurysale.comThe "matte gold" used to make the case and bracelet was prepared using the hammering technique of the Italian jeweler Carolina Bucci. After the part is formed but before assembly, the metal is frosted, just like other decorative techniques. For those who are curious, Audemars Piguet has a short video showing some of the short-lived processes going on here - note that this is not done by a sensible old watchmaker behind a table but with an efficient The machine is done.