Perpetuelle.com is a social networking website for watch owners, collectors and enthusiasts launched into beta in fall of 2008. Perpetuelle.com is named after the world`s first self-winding (automatic) watch, the perpetuelle, invented in 1770 by Abraham-Louis Perrelet for pocket watches but perfected in the late 18th century by famous watchmaker ....
Found on
http://en.wikipedia.org/wiki/Perpetuelle
A watch that is wound automatically and continuously by the motions of a weight that swings round under the influence of gravity as the wearer's movements put the watch into different positions. Â The principle was known in the eighteenth century.
Found on
http://www.encyclo.co.uk/local/20450
No exact match found.
