Patina is the natural surface layer that forms on bronze as it reacts with its environment.

The appearance of patina can vary significantly depending on factors such as humidity, climate, skin chemistry, exposure to saltwater, and daily wear habits.

Some watches may develop a subtle darkening, while others may show more noticeable variations in tone and texture over time.

Because patina develops naturally, no two bronze watches will age in exactly the same way.

Many collectors consider this evolving appearance to be one of the most distinctive characteristics of bronze watches.