Which was the last country (besides US, Canada, and Mexico) to use silver in standard circulating coins?
You already have a thread asking this question: The last country to use silver coins. I believe the answer to this question can be found in your other thread.
South African Republic (for example). Here is a silver 50-cents coin for an appeal. Weight - 28,28 (!) g
Right, and Hobo even posted the link. Here it is again: http://www.cointalk.com/t216433 It may be disappointing that there is no easy answer. But that is not a reason to open a new topic about the same question. Christian