It is a KM#657 Sweden 1/3 skilling piece. Could be an overdate. Check the last 8 in the date. If there are traces of a 7 underneath it, you have the 1848/7. Oddly, with this particular variety, the overdate is actually worth a little less than a coin without the overdate. It's often the other way around with overdates. I can't tell from your pictures whether or not your coin is the overdate, but in this grade range, with the hole, it doesn't really matter much whether it is or not. It's got VF-XF details, so regardless of variety, it would've been about a $10-15-ish coin without the hole. As-is, it's worth a few bucks. Maybe three to five dollars or so. It's a cool "holey" and makes a nice little charm, though most collectors will have little interest in it now. It's a jewelry piece now.
