Australia has never produced a "nickel" coin.
The last Australian Penny was minted in 1964.
5 cents
Such a coin does not exist. There were no Australian 1967 50 cent coins minted.
Canadian nickels (1922 and later) never contained silver. A 1967 Centennial nickel is made of 99.9% nickel and is worth about 15 cents in above-average condition.
If it's been in circulation, maybe face value to 10 cents.
That's a Canadian centennial nickel from 1967. It's currently worth about 7 cents for the metal content.
its worth bout a 1.50
50-1000 usd
From 1967 onwards, no general circulation Australian coin has contained any silver, or any other precious metal at all. Since 1967, all Australian "silver" coins are made from a 75% copper and 25% nickel alloy.
The coin is still in circulation today and has face value only. Spend it.
...25 cents. It is in common circulation, made out of copper-nickel and not worth any more than face value.