How to find manufacture date

I found out when and where my MBP was made. Mine works great and the hinge is fine which I was most worried about. It appears mine was built about 3 weeks ago and I can imagine after all the feedback problems they might have tightened it up and also paid more attention to fingerprints since I don"t have any like others are reporting. It shows over 8000 made in a week which I imagine is not full production so there might be multiple factories, but I really have no clue. It was made in week 41 so its right off the assembly line. Curious to see if there are other factories in different cities. That could give some insight to why some are having problems with hinges and some not. Or maybe it's because it's so new. I intentionally left off the serial number here. Link to see yours can be found at:

http://www.chipmunk.nl/klantenservice/applemodel.html

Serial number: -----------
Name: MacBook Pro (Late 2008)
Model: Mxxxx MacBook Pro 2.53GHz
Screen size: 15 inch
Memory - number of slots: 2
Factory: W8 (Shanghai China)
URL: Technical specifications by apple-history.com code tonumber: 779 -

Model introduced: 2008
Production year: 2008
Production week: 41 (October)
Production number: 8339 (within this week)