The best nearest equivalent I can come up with is a rather nice pressure cast base metal silver plated fake.
Density near correct (lead admixture in the alloy?), but slightly smaller and thicker flan, and about 2 grams under weight, it has hints of a green verdigris haze trying to appear through the plating.
Circumferential casting seam has bee skillfully filed away and there is very little evidence of casting bubbles or pimples in the fields. Probably artificially patinated by a rub over with Renwax.
Style quite acceptable for the type, - molds almost certainly taken from a genuine coin, probably using the lost wax investment casting method.
Against mine, example pictured looks to be OK.