Satin Finish 2013 Native American Dollar?

I know the U.S. Mint stopped making satin finish coins in 2010, so I was surprised to see what looks like satin finish on this 2013P dollar coin taken from a mint set. Notice the difference between it and the Denver mint coin! The web seems to have no information.

What's going on here? Is this normal?

Photo #1: P
Photo #2: D
Photo #3: Both

 

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Which one is which?

 

Philadelphia first, followed by Denver. Updated photos to show side by side with mint mark labeled.

 

There are 5 photos and 6 coins.

Photo 1 is Philadelphia
Photo 2 is Denver
Photo 3 is ? on left, and ? on right
Photo 4 is ?
Photo 5 is ?

 

I changed the photos to be more clear.

 

Thanks!...Now on to the thinking and reading to solve the mystery. Back later with my opinion.

 

Here's a hypothesis:. Philadelphia had a lot of leftover satin finish planchettes to burn through.

 

To tell you the truth, I'm not seeing a satin finish. I think it was a normal coin picked from a stack to be included in the set. Just my opinion.

 

How about this picture I found on eBay. It's looking consistent to me.

 

If you really think you have something, you're going to either have it authenticated (ANACS or IGC should be ok) or start doing some research. I believe many mint records are available on the Newman Numismatic Portal. You'll need to find some documentation indicating the mint actually used extra satin finished planchets for production.

https://nnpdev.wustl.edu/

Without the authentication or documentation all you have is an opinion. I don't think it's a satin finish, but once again, just an opinion.