Absolutely impossible to grade from those photographs. Congrats on buying a coin, but that's all I can tell you.
I am giving up...I can't get a representative picture at all...it is a very clean MS67, but when I get the coin to look right, the holder is messing with it. Get the holder out of it, the coin is flat. Very white, very clean with no loop...with the loop, the key mark is the one around the 0 in 2014 which is only visible in the last photo. Sorry to waste time with my terrible photo skills. Have tried 1 light, 2 light, diffused light, head on, across, etc. Can't get it right....I am just bad at photos.
I think the S mint atb's thing is kinda silly, but I do like them, and bought them all thru the 2014's. There's just something about that S mint mark. I am not qualified to grade this one, but I'd say it's quite awesome.