There is only one half of what should have been an original frame case, and the hook closure is still intact. What appears to be original paper is behind the plate and frame. The frame looks identical to one in the Liljenquist Family Collection of Civil War Photographs (the one with three soldiers holding a 34 star flag); you can see it at the Library of Congress's website. Is this a USMC Marine?
The item "1860s Civil War Ambrotype 1/4 Plate Soldier Sailor Rubber Overcoat Hood Frame" is in sale since Sunday, July 03, 2016. This item is in the category "Collectibles\Militaria\Civil War (1861-65)\Original Period Items\Photographs". The seller is "monie7" and is located in Fuquay Varina, North Carolina. This item can be shipped worldwide.