Antique Delft blue and white tin glazed leaping fish vase

Antique Delft blue and white tin glazed leaping fish vase
Hand painted pottery. Has a painted makers mark AK 478 31
AK belongs to: Adrianus Kocx, owner of De Grieksche A, 1687-1701.
But naughty people have been known to copy it and I believe this is more likely to be 19th century rather than 17th. Unless you know better!
It is 7.5 inches tall
It is sound but does have the usual fritting and chips

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