I have just completed a new post in the Pencils.com Collectors Corner Resources page that discusses an interesting point about country of origin marking. This relates to a press release I recently read from Staedtler on the 170th anniversary of thier produciton of pencils in Germany. You can link direct to this post here.
Note that there is no intent to disparage Staedtler's reputation here just to use this post to point out a seeming global disparity in country of origin marking regulations. In Mexico the rule is different than both European Union and in the US and reliyes on % of value added content in Mexico, while US's rule is based on theory of substantial transformation.