A steel watch resists time; a bronze one records it. Our Expedition Bronze is the only case we make that changes with its owner — oxidising to a matte brown-green that no two wrists share. Some buyers polish it back. Most don't. This is a small essay about letting objects keep a diary. Bronze is mostly copper, and copper reacts. Sweat, sea air, and sunlight each leave their own colour, so a case worn on a sailing trip ages differently from one worn at a desk. After a year the watch carries a record of where it has been. The caseback is the exception. We make it in steel so the metal that touches skin stays clean, while the case around it is free to change. If you prefer the fresh-from-the-bench glow, a soft cloth and a little lemon juice bring it back in minutes. We just ask you to try living with the patina for a season first.