Forget stainless steel. The "Brass" in the keyword is literal. The case is machined from solid naval brass, left unplated. Over time, it will patina—darkening to a rich, brownish-gold that smells faintly of old coins and antique hotel keys. This patina is the "work" of the wearer's skin chemistry. Tinto Brass would love the metaphor: the watch ages like a body, marked by time and touch.