PROOF OR PROOF LIKE? 1959 SIXPENCE GB

I HAVE THIS 1959 GB SIXPENCE. I AM NOT CLEARLY SURE ABOUT IT'S GRADE OR MINT STATE. HAD THOUSANDS OF THESE BEFORE BUT THIS IS THE BEST EXAMPLE I HAVE SEEN SO FAR. IT HAS SOME LIGHT CAMEO EFFECT AND VERY SHARP DETAILS ESPECIALLY ON THE REVERSE BUT ALSO ON THE OBVERSE. IS IT A PROOF OR IS A PROOF LIKE? MAYBE A MATTE PROOF? THANKS FOR ANY HELP

 

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Appears to be an early strike, IMO

 

I don't do World Coins, so not a lot of help to you. While this will be seen by many, you might want to post this in World Coins and use Full Image.
Welcome to CT and heres is my standard spiel to new members.
You should always post FULL IMAGE photos (after you upload your photo, two buttons appear: Thumbnail and Full Image, click Full Image and your photo appears full size on your post and is easily enlarged by clicking on it. Always show both the obverse and reverse, even if your question is just about one side. Members can often give more valuable information having both sides to evaluate. Crop out superfluous background so just the coin shows, and post photos with correct orientation so members don't have to turn their computer in some awkward fashion to view it properly. Add close ups of areas you have questions about and make your questions as definitive as possible so we know what you are asking for. And try to have the best lighting possible to show the most favorable photo of the coin. Hope this helps in the future. Good luck.