Watch aficionados have enthusiastically welcomed bronze-cased watches into their collections, namely because of the patinating properties.
Bronze has been known to take on a deep brown patina, Collectors love the unique patina that grows with him or her over time — a clear correlation to the popularity of distressed and vintage styled watches.
Bronze it can be used below the surface in salt water for a lifetime, with virtually no signs of corrosion — thus, the reason for its long.
Bronze material usually use CUSN,So says cusn watches or cusn8 watches.