I think so, but it is a little hard to be sure from the picture. Does it look like the metal is peeling up and away around the edges of the faults? If so, then yes.
Peels and planchet flaws are about the most common form of error in Australian pre-decimal coins. They are caused by flaws in the metal itself which causes layers of the coin to peel off before being struck or more commonly, after they are struck. The extreme form of this error is when the entire coin splits in half, known as a split planchet.
Prestigecoins, is the coin splitting in the middle? If not, my guess would be that you have an acid dipped coin, and not a half planchet. Of course, I am going by what I know in regards to US coinage and the not so rare acid bath that appears on a lot of Lincoln cents during a chemistry class.
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