A cast replica of a Mexico 1733 klippe dies 8 Reales - see compared to a previously observed example below.
Note that it is indeed a repro of an 8 rather than a 4, despite the very low weight (13g minus the bezel vs. the ~27g weight as made for a genuine example)... the denomination is clear on the other piece.
Study genuine examples, then come back and look at these - should start to become clear.
