When did the 50c coin change shape?
Michael Gray
Updated on April 11, 2026
September 1969
The decision to reissue a fifty cent coin considered not only a change to materials but also different shapes to help solve the confusion with the twenty cents. A new shape and alloy was reintroduced into circulation in September 1969. This denomination has since been used for commemorative designs.
Why is the 50 cent coin not round?
Fifty cent coins were round when they were first introduced in Australia in 1966 and were made from 80 per cent silver and 20 per cent copper. The design was changed in 1969 because it was too often confused with the 20c coin. One man said: ‘Their weight in silver is what they are worth unless in minted condition. ‘
What size is a 50 cent coin?
It is the largest United States circulating coin currently produced in both size and weight, being 1
How many different 50c coins are there?
Since 1969 there have been 31 different designs featured on the reverse of circulating 50 cent coins produced by the Mint, including the Commonwealth Coat of Arms sculpted by Stuart Devlin.
What is the shape of an Australian 50 cent coin?
All coins have length, width and depth, and are thus 3D objects. The Australian 50 cent coin has twelve sides, and so is dodecagonal in shape. What is the volume of an Australian 50 cent coin?
When was the first round 50c coin made?
Unique Round Shape Australia’s first 50c coin was only in circulation during the year of 1966, making this a rare collectable. Made from 80% silver, the coin was often hoarded or melted for its metal value causing the coin to vanish from circulation.
What kind of metal is a 50 cent coin made out of?
It was both a new shape and made from a different alloy. It is still used to this day. The current 50 cent coin is made of 75% copper and 25% nickel. Its shape is dodecagonal (12 sided), and it has a plain edge. It weighs 15.55 grams and measures 31.65 millimetres across flats. Many different commemorative 50 cent coins have been produced.
How big is a 1966 50 cent coin?
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. Is the Australian 50 cent coin still in circulation?
