Originally Posted by
GamleOle
Think I've created a misunderstanding, sorry.
Where on the items do I find the code?
Depends on the part. Shimano's are usually stamped on the back side of the component such as on the back of the crank arms. You'll see 2 letters stamped. Here is the sight that will tell you what they mean.
http://www.vintage-trek.com/component_dates.htm