Tuvalu 2005 $1 1930 Penny 75th Anniversary Copper Plated 1oz Silver Proof Coin

The 1930 Australian penny is rare and valuable because it was minted by accident during the Great Depression and its existence remained a secret for decades. The worldwide deflationary spiral saw Australia’s economy shrink and the Melbourne Mint was not required to strike many coins from 1929 to 1933. No pennies were struck in 1930 - or so it was thought.