They look to be from a prison camp, possibly WW2. Not sure how to tell if they are original https://imgur.com/a/P9xqQSe
The second and third are concentration camp photos, you can see them online at the Holocaust Museum:
"Original" is always a challenging term with a photograph; only the negative is "original", what you're looking at is a photographic print, of which there could be one or many. As this particular image is in the National Archives, there's no rarity to a print per se. It's possible that the print might have a particular historical significance -- perhaps printed by the photographer Arnold E. Samuelson himself, or with some other association. You'd have to inspect the print closely to see if it was printed from the original negative, or whether it's been copied from some other source.
Samuelson was with the US Army Signal Corps and was a combat photographer during WW II, and photographed the aftermath of the Holocaust at Ebensee and other camps.
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