Apart from the obvious detail that it has King George VI on the obverse, Commonwealth of Australia, One Crown, 1937 and a Crown on the reverse, it is 38.5mm in diameter and made from 92.5% silver?
It will be in some sort of a case or other protective packaging with a reference to the coin being of Proof quality, and possibly a certificate of authenticity.
The flat surfaces of the coin will have a mirror finish to it and there will be no dents, scratches or wear, maybe a little discolouring due to age.
There were only 100 of them minted, and being made from Sterling silver, they would have been very expensive to buy in 1937.
The general circulation coin is not minted to such a high quality finish as the Proof coin and is very likely to have been in circulation at least very briefly and will have some indication of circulation such as dents, scratches and wear on the surface. There were 1.008 million general circulation coins minted.
All Australian 1992 coins are potentially still in circulation so, unless they are a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth whatever is inscribed on them.
There were only two years when an Australian Crown (Five Shilling) coins was minted, being 1937 and 1938. If by "polished die" you mean a "Proof" coin, both the 1937 and 1938 coins were minted as Proof and general circulation coins.
All years of issues of the Australian Two Dollar coin are still potentially in circulationso, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth Two Dollars.
These coins are potentially still in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 20 cents.
These coins have only just been released into circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 50 cents. If you have a Proof coin or an Uncirculated mint condition coin, they are worth whatever you just paid for them.
These coins are no longer in circulation, but unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 2 cents. An Australian 1987 2 cent coin was only ever released as part of a Mint set. An Australian 1987 bronze 2 cent coin (Elizabeth II)(Proof), uncirculated and in absolute mint condition could fetch up to $5 AUD. A reputable coin dealer will be able to give a more accurate valuation.
The Australian 2 cent coin was made from bronze. If you have a silver coin it would be because somebody has plated it. These coins are no longer in circulation, but unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 2 cents.
These coins are no longer in circulation, but unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 1 cent. An Australian 1990 bronze 1 cent coin (QE II), uncirculated and in absolute mint condition could fetch up to $3 AUD. There were 52.993 million minted. An Australian 1990 bronze 1 cent coin (QE II)(Proof), uncirculated and in absolute mint condition could fetch up to $5 AUD. A reputable coin dealer will be able to give a more accurate valuation.
These coins are no longer in circulation, but unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 1 cent. An Australian 1989 bronze 1 cent coin (Elizabeth II), uncirculated and in absolute mint condition could fetch up to $2 AUD. There were 168.0 million minted. An Australian 1989 bronze 1 cent coin (Elizabeth II)(Proof), uncirculated and in absolute mint condition could fetch up to $5 AUD. A reputable coin dealer will be able to give a more accurate valuation.
These coins are potentially still in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 20 cents. An Australian 1998 cupro-nickel 20 cent coin (Elizabeth II), uncirculated and in absolute mint condition could fetch up to $6 AUD. There were 28.831 million minted. An Australian 1998 cupro-nickel 20 cent coin (Elizabeth II)(Proof), uncirculated and in absolute mint condition could fetch up to $25 AUD. A reputable coin dealer will be able to give a more accurate valuation.
These coins are potentially still in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 20 cents. An Australian 1974 cupro-nickel 20 cent coin (Elizabeth II), uncirculated and in absolute mint condition could fetch up to $20 AUD. There were 33.548 million minted. An Australian 1974 cupro-nickel 20 cent coin (Elizabeth II)(Proof), uncirculated and in absolute mint condition could fetch up to $30 AUD. A reputable coin dealer will be able to give a more accurate valuation.
An Australian 2004 10 cent coin, uncirculated and in absolute mint condition could fetch up to $2 AUD. An Australian 2004 10 cent coin (Proof), uncirculated and in absolute mint condition could fetch up to $2 AUD. There were 89.1 million minted. These coins are still in circulation so, unless they are part of a proof set or are uncirculated and in absolute mint condition, they are worth 10 cents. A reputable coin dealer will be able to give a more accurate valuation.