I have been fascinated by Jaeger LeCoultre watches for some time now and often talk to a uni friend of mine about it as well as walk into watch shops selling them to have a chat with the often very knowledgeable sales people (some are complete muppets though, haha). Anyway, I just checked this video on youtube, very interesting, considering he actually opens the watch up (usually it's a silent video of someone showing their watch from the outside, turning it around, etc, and that's it).
Hope you enjoy it too:
http://nl.youtube.com/watch?v=myGV9n5muBI&...feature=related