Clock hand is used in the human wrist. Clock hands (watch) the electric first introduced in 1957 in Lancaster, Pennsylvania, United States by the Hamilton Watch Company. Research to produce an electric watch has been started since 1946. But in 1969, Hamilton Electric watch Obsolete stop production because the electric had found a more advanced technology in accordance with the progress of the times.

Pocket watch or clock timer bag is carried in the pocket. This hour slightly larger than a watch, and do not have a watch strap like a watch. As a replacement watch strap is the following chain of clips that can be attributed to the vest, lapel, or belt, so that the pocket watch is not easy to fall or disappear. Pocket watches generally have a plate that shows the time in analog.

Pocket watch consists of two types: pocket watch without the lid, and a pocket watch hunter case (in French: savonette) which has hinged lid that can be opened. Close hour intended to protect the surface of hours from scratch, and at the same time allows the carrier to see time in less light. Pocket watch is standard equipment engineer and train conductor, though his role began to be replaced by a chronometer wristwatch.

Phone wristwatch or mobile phone watchphone is packaged in the form of a wristwatch. Its size is larger than the watch in general and about the same as a sports watch. Discovery watch cell phone technology aims to use mobile phones based mengimprovisasi watch functions that are practical to use the innate function. Unlike mobile phones in general, a watch phone that is used in a way put on the wrist to make users do not bother to open the bag or reach into the bag when a call. Because the mobile phone watch is always in a state mounted on the wrist, the user’s mobile phone wristwatch will be spared from the risk of misplaced and lost.