An automatic (or self-winding) watch is fitted with a device (rotor) that automatically winds the spring by using the force of gravity. It needs no battery, but it will stop if you have been physically inactive for an extended period of time--as long as you're moving, the watch will stay powered. Swiss watchmaker Abraham-Louis Perrelet invented the self-winding mechanism in 1770. It worked on the same principle as a modern pedometer, and was designed to wind as the owner walked.
Tritnite is a luminous material with an extended glow exclusively developed by Invicta in Switzerland and added to their timepiece hands and markers. When exposed to regular daylight, it will hold its glow for about 20 hours.
About Invicta Latin for "invincible," Invicta was founded in La Chaux-de-fonds, Switzerland in 1837 by Raphael Picard, who believed that fine Swiss timepieces could be offered at modest prices. For more than a century, the company has created distinctive manual and automatic-winding pieces. In 1991, descendants of the Picard family reaffirmed the company's founding principle, and the invigorated Invicta has been growing ever since with one of the most widely diverse collections of precise Swiss timepieces on the market.
