Hmm, the pic doesn’t show the mirrored (very shiny) fields. So, the devices (raised areas) are frosted and the fields (flat areas) are shiny like a mirror?
Bottom line, not much can be said from photos, even excellent ones (no offense intended). First step, take it to a coin dealer in your area. He can see it in-hand and start to make some determination. As you see on this board, not everyone agrees, so be prepared to take it to more than one dealer. BTW, it costs a bunch to "send it in" to be graded.
I think the distortion is more from shooting the coin at an angle still in the lens from the proof set.
Ok, that's a silver proof set. Like was mentioned, you may want to take it to dealers for their opinions - but, if they want to buy it from you, don't sell it, that means it may be worth a lot. Many, even dealers, cannot tell the difference between MD & DD, so if it were mine, I'd still send it in for a cost of about $40. If it's a DDR, it could be worth $100's or $1,000's. Even so, if it is a DDR, I'd probably wait to see how many are found and if the market drives the price up before I'd sell it.
Again, pics are terrible at determining what it is. The subsequent pics you posted look more like MD. Does the second image look flatter than the top image? If so, it's MD. If the second image is rounded and exactly duplicates the top image, it's probably a DDR.
Perhaps you could take a picture of the Sac's reverse straight on instead of at an angle, one with and one without the loupe over the camera's lens and post both. It might show the area better. I still think because of the angle of the first pics, it's causing a distortion that would suggest doubling of some kind. The straight on pics would eliminate that.
Be sure to let us know what you find out about your coin. If it's a DDR, we'll all want to check our sets.
Question for all. I know DD's exist on proofs, yet they're rare. But, how common is MD on proofs? I don't recall ever seeing it, but maybe I'm just lucky.
It's neither. I just received delivery of a 2012 Sac proof, and checked it with my loupe. It's in the design, identical to the OP's. Looks like it's from the overlap of the Chief's profile over the neck of the horse.
Guys, take another look at the 1st picture.. blow it up.. look at the profile of the Indians face.. THEN.. check out the eye
Hey what you are saying does not tell us that op's coin is not a doubled die. It makes it sound even more like the op's coin may be a doubled die. All doubled die coins from the same die are identical and maybe you found a doubled die coin. the op said he had some more of these coins and the rest were not like this one.