The 1966 round 50 cent coin was the highest-denomination and largest diameter coin of the Australian dollar’s decimal coins, introduced in 1966. Due to large amounts made in 1966 and the rising cost of silver, it was not made in any other year. It was replaced by a dodecagonal 50 cent coin in 1969, which retained its reverse of the Australian Coat of Arms.
It is made of 80% silver and 20% copper, but as the value of a free-floating silver piece grew higher, the coins’ bullion value became higher than their face value and so were withdrawn from circulation. A total of 36.45 million coins were minted with 14 million put into circulation.
| Weight | (g) | 13.28g |
| Precious Metal Content  | (Troy oz) | 0.3416 oz Silver |
| Metal Composition | (% purity) | Silver (80%), Copper (20%) |
More Information: https://en.wikipedia.org/wiki/Australian_round_fifty-cent_coin
ABOUT ROYAL AUSTRALIAN MINT
The Royal Australian Mint, established in 1965 through the Royal Australian Mint Act, is the sole producer of Australia's circulating coins. Located in Canberra, it was officially opened on February 22, 1965, by Prince Philip, Duke of Edinburgh.
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Its primary purpose is to produce legal tender coins for circulation, commemorative coins, and other numismatic products, ensuring a stable supply of high-quality coins. The Mint has embraced modern minting technologies, investing in state-of-the-art equipment and techniques.
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Known for its innovative designs, the Mint's coins often feature iconic Australian symbols, historical events, and cultural motifs, celebrating the nation's diverse heritage and natural beauty. It issues commemorative coins to mark significant events, anniversaries, and milestones, highly sought after by collectors.
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Internationally recognized for excellence in coin production and design, the Mint has won numerous awards and collaborates with mints worldwide. It engages the public through tours, educational programs, exhibitions, and events, promoting numismatic awareness and showcasing its heritage.
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Swan Bullion Company is proud to be an authorised distributor for both Royal Australian Mint bullion and numismatic products.
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1/10oz Gold Bullion Secondary Market 
Anonymous (verified owner) –
1966 50 cent silver rounds, just great value! Thank you Swan Bullion.
Anonymous (verified owner) –
very nice coin , they look almost new . great job on these ones
Anonymous (verified owner) –
1966 Silver rounds are great value! Always great to get some. Thanks SB