There is NO residual circulating silver coinage in Australia.
Hovever my accumulation of scrap U.S. silver coin is about the same size.
I extracted most of it from dealers' jubk bins years ago, when the silver price was around the $5 to $10 range.
I have about the same amount added to this, with World scrap silver, accumulated during the same period.
Accumulated next to nothing since that period.