Just Anderen metal figure of a boy on a fish

Very hard to find disko metal sculpture of a boy (mer-child ?) on a fish.
(Disko Metal is an alloy of lead and antimony, which was Andersen's own invention and named after the Disko Bay of Greenland, where he grew up.)
Nice patina and excellent condition.
Stamped JUST DENMARK 1688.
Height 6 1/2" (16.5cm ) Width 8 1/4" (21cm)
Circa 1930-1940