Portugal 3 Vintens 1688 to 1706 - is this right?

I picked this coin up with a bunch of British coins the other day. It looks very nice, but is it too good to be true?
Measures approx 19mm diameter and weighs 2.1g. Numista page: https://en.numista.com/catalogue/pieces35464.html

 

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Can't see any red flags Paddy. Nice one.