As of 2014, instructions for Armitron WR165 watches can be found on the Armitron website in the Warranty and Instructions section. Manuals for Armitron watches can also be found on websites such as Manuals Online, while basic instructions for different functions are available on DIY websites, such as Fixya.
To find the exact manual, use the watch style number, which uses this format: 00/0000, located on the case back. The term WR165 refers to the water-resistance level of the watch and varies based on the water resistance of a particular watch. Armitron is a product of E. Gluck Corporation, an American watch manufacturer based in Long Island, N.Y.