Big Erosion And Some Serious Currents

[Joe D.]

   Speaking of coins no one wants to carry, how many Susan B. Anthony, and Sacaagwea coins have any of you coin shark's found??😁👍👍

[geof_junk]

Aust. coins were made of sterling silver except pennies and ½ pennies (copper)and were based on silver value/weight till 1946 and when silver went up they keep the same size but made them out of 50% silver. On Feb 1966 they changed over to copper/nickel and still keep the same size. They also released a 50 cent 80% silver piece and were taken out of circulation in no time because the silver price went up soon after release. Diameter: 31.51 mm At decimal change over the copper coins were reduced in size to a fraction of the weight/size. 

The original, round, 50-cent coin was made of 80% silver and 20% copper; but as the value of a free-floating silver price became higher, the coin's bullion value became more valuable than its face value; so that version was withdrawn from circulation and replaced with the dodecagonal cupro-nickel version. 

Diameter	31.65 (across flats[1]) mm

It is by diameter the largest Australian coin currently issued and second largest after the Crown of 1937–38. It is also the heaviest Australian coin in common circulation. Many commemorative designs have been issued, the large size allowing for detailed content