2 Blanks Stamped Together?

I'm not an experienced coin collector and I've read a few postings and see that a lot of these are fake. But I have to ask if anyone might recognize what would make the marks on the nickel in the photos. In each picture the nickel in question is on the left. Around the entire edge it looks like a seam and on the front and back face of the nickel the edges are equally raised much more than a plain nickel and feels sharp. The front and back pictures are slightly miss-aligned too. I almost thought this was 2 nickels pressed together but the weight seems to be about the same as any other nickel. I used a crude balance scale to check the weight. There is a very slight indent along the seam and inspecting the seam with a magnifying lens it doesn't appear to be one coin pressed inside a shell. If that were the case I would assume that the raised sharp edge around the faces of the front and back would be different. I can try to take some pictures of other angles if it might help. It's hard to get the lighting right and keep it in focus with the macro lens. Thanks for any assistance, ideas or suggestions. Oh I've already tried to pull it apart too being careful to not damage