I'd assume whoever made that entry on Numista had an example of the coin, and weighed it, and that was the weight of their specific coin, so that's what they put as the weight. In that sense, it's not "wrong", just overly specific.
The official (legal) tolerance for the 50 cent piece is plus or minus 0.96 grams; a 0.18 gram difference in weight is well within tolerance.
The official (legal) tolerance for the 50 cent piece is plus or minus 0.96 grams; a 0.18 gram difference in weight is well within tolerance.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis