These automatic watches, also known as self-winding watch, are a mechanical watch using NH35A (Seiko) or Miyota 9015 (Citizen) Automatic Movement in which the natural motion of the wearer provides energy to run the watch, making manual winding unnecessary.
Trintec Industries Inc. was founded in 1984 as a manufacturer of unique aviation inspired watches and Zulu Instruments. Trintec was the first company to produce and sell an aviation inspired watch which featured the design elements of an aircraft altimeter. The original Altimeter Watch was produced in 1990. Over the years the company has expanded from being primarily aviation focused and has developed numerous products which include a large selection of precision nautical instruments including barometers, clocks, Tide clocks and weather stations.