Watches have been developed many centuries ago. These pieces started only as sundials and later on improved its designs with time. Modern watches are usually worn on the wrist which consists of a bracelet or strap made of leather, metal, alloy or rubber. It also features other useful functions including the date. Like todays wristwatches, pocket watches consist of two main components, the inner works and a metal case. Many different metals were used for early pocket watchcases including gold and silver. The case was usually of a two replica Louis Vuitton handbags piece clamshell design.