Actually I've been wearing this since the 1st day of launched (Cuff model) Everything was anticipated under good conditions. However, as day goes by, I found some small dark marks in the band. Underneath got no problems. Anyone mind to share your way of cleaning your band? Hermès told me simply stay away from water and moisture area, thus is |"" update: Hermès told me that, this type of leather does, however, develop patina over a series of time.