The most valuable Australian 50 cent pieces are often error coins, with the 1988 Coat of Arms 50c (with the standard design instead of the commemorative First Fleet boat) being exceptionally rare and worth thousands, while the silver 1966 Round 50c is valuable for its silver content, pulling it from circulation and making it sought after, and some lower mintage years like 1972, 1973, 1993 in top condition also command significant premiums.
The most valuable Kennedy Half Dollars include the 1964 SMS (Special Mint Set) coin, which can be worth thousands of dollars, and the 1964-D Doubled Die Obverse variety. Other valuable examples are the 1970-D, 1998-S Matte Proof, and the 1964 Proof coins.
Valuable half dollars are typically older silver coins (pre-1965), 40% silver Kennedy halves (1965-1970), specific key dates/mint marks (like low-mintage Walking Liberties or Capped Busts), error coins, or special proof/matte finish issues (like some San Francisco proofs from the 90s). The easiest rule is pre-1971 half dollars have silver content, making them worth more than face value, but look for rare dates in older series like Walking Liberty or Barber, or modern proofs for significant premiums.
The Round 50-Cent Coin (1966)
Before our 50-cent coins became dodecagons (that's a fancy word for 12-sided), they were round and made out of, wait for it… 80% SILVER. Because of their silver content, these coins were quickly pulled from circulation, making them highly sought after.
The 50-cent coin that can be worth around $15,000 is the rare 1988 Australian 50c error coin, mistakenly struck with the standard Coat of Arms instead of the commemorative First Fleet design, with only a couple known, though more might be found; it's a "mule" error from the Royal Australian Mint, making it extremely valuable to collectors.
25 million of these coins were struck, so they are not rare at all when in used condition. Some collectors are prepared to pay a premium for them in mint condition - as the images here show, this coin certainly meets that standard.
Errors on the 1966 Australian round 50 cent coin, a sought-after silver coin, are quite rare but typically involve planchet flaws, like deep cracks (lamination errors) from trapped gas or poor alloy, or strike-through errors, where the coin was struck through foreign material, sometimes causing a double rim or other markings on the design. Other less significant variations, like the double bar behind the Emu, were part of the original design and not considered true errors.
Other rare 50 cent coins to look for include those from 1985 and 1993, which were other low mintage years. In 1985, only one million 50 cent coins were produced by the Mint making them worth between $15 and $40 each. In 1993, there were also only one million 50 cent coins made.
1964 and Earlier: All half dollars minted in 1964 or before are 90% silver. This includes Franklin Half Dollars and Walking Liberty Half Dollars. These coins are always worth much more than 50 cents, based on the current price of silver. 1965 to 1970: Kennedy Half Dollars from these years are 40% silver.
The Australian 2020 Firefighter $2 coin with the rare "bullseye error," where the flame design is mistakenly printed over the Queen's face instead of between the firefighters, can be worth up to $6,000 in mint condition, with an uncirculated example selling for nearly that amount. While other error coins exist, this specific minting mistake makes the Firefighter coin a highly sought-after treasure for collectors.
50 CENT Royal Wedding mint coin, un circulated, CHARLES & DIANA.
1972 Kennedy Half Dollar Value
According to the NGC Price Guide, as of January 2026, a Kennedy Half Dollar from 1972 in circulated condition is worth between $0.60 and $0.75.
All 50 cent coins minted in 1988 were supposed to feature a First Fleet boat and the dates 1788-1988 to celebrate the bicentenary. Instead, some coins were accidentally printed with the standard coat of arms. It is understood only two of the “excessively rare” coins are floating around but more could exist.
If you don't count over-dates, proofs, and strange varieties then the rarest half dollar coin is the 1873-S with no arrows. None of those coins are thought to have survived. The rarest coins that still exist are the 1796 and 1797 halves.
The 1981 Australian Charles and Di 50 cent piece in nice uncirculated condition (but ungraded) would sell for around AUD$5 to $10. The 1988 5 dollar coin (gold toned, no gold content) is in the same range. Please let me know if the valuation and information was received and if you have any follow-up questions. Thanks!
List of designs
Australian 1977 Silver Jubilee 50 Cent Coin.
An Australian 2000 $1 "Mule" coin, created by mistake using the smaller 10-cent coin's head (obverse) die, can be worth up to $3,000 due to its distinct double rim and off-center appearance, but its value depends heavily on its condition, with only a few thousand believed to exist.
However, there are some coins that can increase their value thanks to the practice of coin-collecting. Such is the case of the 50-cent coins called “Walking Liberty.” These coins are among the most sought after by coin hunters thanks to their artistic design and the history they represent.
An extremely rare 1988 coin could be worth nearly $15,000 due to an error by the Royal Australian Mint. The coins commemorate the 200th anniversary of the arrival of the First Fleet. However, instead of replacing the standard coat of arms with this design, some coins feature both designs.
AUSTRALIAN 1970 ELIZABETH II 50c Coin 'ERROR WORM STRIKE' - Captain James Cook.
The 1966 round 50 cent coin is a favorite among collectors, primarily due to its silver content and historical significance. As with many collectible coins, the value of a round 50 cent piece depends on several factors, including its condition, rarity, and demand among collectors.
Yes, some Australian 50 cent coins are worth significantly more than face value, especially those with low mintages, specific commemorative designs (like the 1991 Ram's Head), or rare minting errors, such as the 1988 Bicentennial coin with the wrong design or the 2000 Millennium coin with a recessed cross. Key valuable types include the silver 1966 coin and modern collector editions in perfect condition.