Citizen makes a number of high-end watches that are effective at performing simple functions -- such as telling time -- as well as other functions. Some are diving watches and work at up to 1,000 feet under sea level. Others work without a battery; their self-charging features benefit from the natural movement of your arm. If you know the serial number of a Citizen watch, you can find the watch on Citizen's website.

Visit the Citizen website (see Resources).

Enter the number into the "Model No" search box at the top of the screen.

Press "Enter." Information about the watch for which you searched will appear.