Andreas Osten Andreas Osten Watch AOS18026 AOS18026 is a beautiful and trendy Ladies watch. Material of the case is Base metal and the Silver dial gives the watch that unique look. In regards to the water resistance, the watch has got a resistancy up to 30 metres. It means it can be worn in scenarios where it is likely to be splashed but not immersed in water. It can be worn while washing your hands and will be fine in rain. The watch is shipped with an original box and a guarantee from the manufacturer.