"You might add that the Ambrotype died out at the end of the Civil War and they certainly were not using the process to photograph West Pointers in 1877!
I am so tired of this stuff. I would love to beat the living crap out of these slimeballs who come up with this stuff. This is a fake ambrotype of Henry Flipper, the first black cadet at West Point. This would be a very valuable image if it were real. Compare it to the "Sitting Bull" ambrotypes already in the fake section. Trust me folks, this is a fake image. Notice how the photocopy (paper image) has been folded and worn to appear like the ambrotype? It is an eBay auction (what else?) and here is the description:
"1/6th plate ambrotype (measures approx. 3-1/4 x 2-3/4") of Henry O. Flipper, the first black graduate of the US Military Academy at West Point. Condition of the image is good, somewhat dark, the image surface has a crackled appearance, but is stable and NOT flaking in any way."