That so-called "Andersonville Prison" ID-tag is laughably fake, for several reasons.
Primarily, there is no historical record of Andersonville ever issuing such an item.
Secondly, note that the letters are stamped individually, one-at-a-time, instead of the letter-dies being mounted on a bar and being struck all at once.
(See an example of a bar-stamped marking on the civil war artillery Gunner's Level in the photo below.)
Also, the "stretched-letter X" meant to represent the Confederate Army's battleflag is obviously hooey.
The many asterisk/starburst stampings scattered all over the item are kinda needlessly decorative for a prison ID-tag, don'tcha think?
I could continue, but I'm sure that's enough, for everybody except the Ebay seller of this completely fake relic.
ANY TIME you see individually-stamped markings on an alleged historical relic, be very-very suspicious that the marking is fake. Especially if it's for sale on Ebay. I'll attach another photo, showing a group of blazingly fake "civil war Slave-Tags."
Mud Hut, it looks like the fake Andersonville tag was produced by the same Faker who made the bogus "Julius Slave Mobile" tag in the photo below. Note the two "decorative" stretched-letter Xs, and the three-digit tag number also being located at the tag's upper right corner, and the square hole.