Yes. The Australian 50 cent coin has been issued in every year except 1967 and 1968.
Such a coin does not exist. The last Australian 1 cent coins were issued for circulation in 1990. They were progressively withdrawn from circulation in 1992.
There are no Australian 5 cent coins minted for general circulation that could be considered to be rare. Australian 5 cent coins, in all years that they were minted, are still potentially 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 5 cents.
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.
The Australian 1 cent coin, along with the 2, 5, 10, 20 and 50 cent coins, were first issued on the 14th of February, 1966 for the introduction of Australia's decimal currency. The last Australian 1 cent coins were issued for circulation in 1990 and they were progressively withdrawn from circulation in 1994.
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.
Yes, the 10 cent coin is smaller. The Australian 10 cent coin is 23.60 mm in diameter. The Australian 20 cent coin is 28.52 mm in diameter.
If you refer to Australian 50 cent coins in general circulation, there are no real rarities. All years of issue of the 12 sided 50 cent coin are potentially still in circulation. The oldest Australian decimal coins are just now reaching their minimum expected useable life span of 40 to 50 years. There are a lot of coins issued "not for general circulation" that could be considered uncommon. The 1966 50 cent coin was not rare, but it was withdrawn from circulation, so you do not see them. The original 1966 50 cent coin was round and had an 80% silver content. Somebody figured out that the silver content of the coin was worth more than than the coin itself (due to the value of silver at that time), so the coin was discontinued. All subsequent 50 cent coins were 12 sided and had no silver in them at all. The silvery appearance is due to a 25% nickel content. An Australian 1966 50 cent coin, uncirculated and in absolute mint condition could fetch up to $8 AUD. There were 36.45 million minted.
on the Australian 20 cent coin it the platypus
The 1989 50 cent coin was not released into circulation but was only available in a mint set. It valued at around $15-$20
The Australian 5 cent coin has an echidna on it?
A very common coin still in circulation, just spend it.
A very common coin still in circulation, just spend it.