Austraila's Round 50 cent coins

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The round 50c coin has always interested me.
The first coins were minted in 1966 with the 80% Silver coin in both Proof and circulation strikes.
It was another 40 years until the next one was Minted When in 2006 there were 2 other round 50c coins produced by RAM these were the 80% silver proof coin that was issued in the yearly Proof set, This one has the Ian Rank Bradly obverse and the Fine silver coin that was minted for the yearly Silver Proof sets.
The 2006 Fine silver Proof coin has the Arnold Machin obverse in keeping with the 40th anniversary of decimal coinage in Australia.
Now another 10 years later in there are more of these round 50c coins minted.
The 2 Gold plated copper nickel coins found in the carded 50th anniversary and the carded WWF coin that is counterstamped.
There are also 2 Silver coins.
The 80% Silver coin found in the in come the dollars in come the cents set and the Fine Silver coin that will be in the yearly fine silver set.
There are also 2 Gold Round 50c coins and these are in the 2006 and 2016 yearly Fine Gold sets .

Feel free to post your images of these coins here