The Buggy Museum received two items that are a mystery for us.  Can anyone help?  They are wooden blocks, 7/8" depth, different height and length.  They have flat metal plates nailed to the block. The metal has an image, but it is a negative image and we can identify the men.  But since this is out of my area, I don't know if these are negatives? Tintypes?  They are different from all other negatives and tintypes that we currently have in our collection.  I can send photos to anyone off list if you can help.  

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