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.
Presumably, you refer to the Australian 50 cent coin. The round Australian 50 cent coin was only ever minted for 1966. All subsequent Australian 50 cent coins are dodecagonal or 12 sided.
The first and only round Australian 50 cent coin was minted in 1966 and was withdrawn shortly afterwards due to the steep rise in the price of silver. The 1966 round 50 cent coin had an 80% silver content. The next Australian 50 cent coin to be issued was in 1969. It was dodecagonal (12 sided) and made from a copper-nickel alloy.
Other than the 1966 coin, the only round 50 cent coin ever issued, the Australian 50 cent coin is a cupro/nickel dodecagonal (12 sided) coin of silvery appearance and is often used as a commemorative.See the link below.
The round Australian 50 cent coin was only ever issued once, in 1966. Three of these 50 cent coins contained one ounce of silver and, as the price of silver increased, the silver content was worth much more than the face value of the coin. The round 50 cent coin at 31.5 mm was also considered to be too similar in size to the 20 cent coin at 28.52 mm. The replacement 12 sided (dodecahedronal) 50 cent coin first issued in 1969 is still 31.5 mm, but its distinctive shape makes it stand out in appearance and feel from other Australian coins.
No. Australian coins, with the exception of the 50 cent coin which is 12 sided or dodecagonal, come in the regulation shape of "round".
According to the good book, all British general circulation 50 Pence coins are heptagonal or 7 sided. There might be the occasional round bullion 50 Pence coin. The Australian 50 cent coin has 12 sides.
Only the 50 cent coin, known as yotin, is square shaped. All other coins are round. For a while the 5 florin note was replaced with a square coin but it's now minted as a round coin.
A round copper coin with a square hole in the middle was called Wuzhu was circulated nationwide
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.
The first, last and only year the round Australian 50 cent coin was issued was in 1966. They were made with an 80% silver content. The price of silver skyrocketed around this time and the silver was worth more than the coin, so they were withdrawn from circulation in 1967. The next Australian 50 cent coin was issued in 1969. It was dodecagonal (12 sided) and made from the more commonplace and cheaper copper-nickel alloy.
No it's the hole that kills collectible value. If the coin is silver it has scrap value