All 50c coins minted that year were supposed to display a First Fleet ship and the dates 1788-1988 to acknowledge the bicentenary. But an unknown number of those were wrongly minted.
1988 50c First Fleet Bicentenary Coin Pack - Aussie Coins and Notes
First Fleet 1988 Bicentenary 50c Cu-Ni Coin Pack – Australian Specialty Coins
Rare coins: An extremely rare 50c coin worth $15,000 is
Detail on rare 50 cent coin makes it worth $800: TikTok
Rare 50c coin is worth up to 30,000 times its face value - have
Rare 50c coin from 1988 minted to celebrate bicentenary worth
Australian 50c coin could be worth $14,750 after printed with
Rare 50c coin from 1988 minted to celebrate bicentenary worth
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