Unless you can find someone who is a collector of such coins, $0.50
If you mean 40 years from 1966, this coin is worth about $2.50 because it is 40% silver. If you mean 40 years from the present, please wait until I can find my crystal ball, LOL!
50 cents
Spend it.
$30 - $50
The coin is face value.
I won't seal 1966 coins 50c praise
R20 000
Australia did not have a Dollar coin in 1944. Decimal currency was introduced in 1966 and the paper Dollar note was replaced with a Dollar coin in 1984.
Its value is still 50 cents South African. This comes to about 0.07c U.S.
today if a 50 cent coin contained the amount of silver and bronze it did in 1966 it would be worth $2.67
The 1966 Australian 50 cent coin has a diameter of 31.5mm. The area of one side of the coin is 779.3 square mm.
The 1966 South African 50 cents coin is between $3.00 and $6.00.
With the exception of the 1966 round 50 cent coin, all issues of the Australian 50 cent coin are potentially still in circulation, so unless they are Mint Uncirculated, not much more than face value. A reputable coin dealer will be able to give a more accurate valuation.
Such a coin does not exist. The first and only round Australian 50 cent coin issued for circulation was issued in 1966. There was a round commemorative Proof coin issued in 2006, but not for circulation.
Not much, only about 50 US cents or so. It is a rather common coin and not rare.
Since it's silver! Between $20-$30. Uncirculated, about $50 or more.
No currently circulating Australian coin contains any silver. The only Australian 50 cent coin to contain any silver was the round 1966 coin which had an 80% silver content, about 0.3416 ounces. At today's prices about $10.70 USD.