Skeleton design automatic watch, made of stainless steel. It works. Approximately, I don't think there was any significant time difference even after using it for a day. The body size is approximately 41mm in outer diameter x 12mm in thickness. The belt size is approximately 20cm around the wrist at its maximum. Since it is a used item, there are scratches, marks, and dirt. Please check the condition carefully in the photos. It will be delivered as shown in the photos. Thank you for looking.