21.11.2012 - Where it comes???!!!! How it works???!!!!

We always wear the watch everytime,but do you where the watch came from and do you know how it work?? This is info that i get,first appeared watch is in 15 century which watch evolved from portable spring-driven clocks.Watch weren't widely worn in pockets until the 17th century. 

Word " watch " came from the old english word " woecca " which meant " watchman ". It is because it was used by town watchmen to keep track of their shift. Another says that the term came from 17th century sailors ,who used the new mechanism to time the length of their shipboard wathes ( duty shifts) Now,let see this video who i get. To me it really fantastic!!!~ n_n when i see this video,now i know how it work.. :p