Back in 2008 I purchased a Specimen set with the Eider dollar. This is the coin I received:

Have any of you ever seen or heard of other errors like this on the specimen Dollar coins? I don't know what this type of error is called, but besides the missing metal area near the duck, just above the second "A" in Canada seems to be a line extending from the rim down into the field. In hand, it looks like what I thin is called a strike through? Haha. Sorry if I have the terms wrong, but I do not have a lot of knowledge when it comes to errors. The photo isn't the best, but it shows what I wanted to convey.
I thought it was kind of neat, so just thought I would share. If any of you have more insight I would love to hear it!
Thanks!