Fast forward a decade and 24.9 million of the coins were produced by the Royal Australian Mint. Out of those millions of 50 cent pieces produced that year, McCauley said it's not known how many ...

The 50 cent coin has been in production since the mid-1960s. While it started out as a circular coin, the dodecagonal design was introduced in 1969. Fast forward a decade and 24.9 million of the coins ...