Athens in Attica, crude modern fake imitating issues of ca. 475-320 BC.

Athens in Attica, crude modern fake imitating issues of ca. 475-320 BC., ,
Tetradrachm fake (ø 19-23 mm / 6,06 g), cast silver(?) alloy, axes irregular alignment ↑→ (ca. 80°), partly filed casting seam on edge,
Obv.: helmeted head of Athena right, crude style.
Rev.: AΘE , owl standing right facing, olive sprig and crescent behind, legend downward to r., all within incuse square.
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Genuine coins show more than 17 g. for the tetradrachms, sharp outlines and no casting seam. This is even too light for the didrachm denomination of more than 8 g.