The July Coin of the Month was to bring along the largest diameter dated circulating coin.
We were presented with an array of large coins including:-
- Persian (Iran) 1925 5 Rial 37mm dia
- US 1 Dollar 1891 38.1mm
- Australian Crown 1937 38.5mm
- UK 1980 Queen Mother 80th birthday coin 38.61mm
- Australian $5 2008 Scouts Centenary coin 38.74mm
- Australian $5 1988 CBA celebrating opening 38.74mm
- Australian $1 1993 silver kangaroo 40.60mm
- Comparison Australian 50 cent piece 31.65 mm
The winner of the largest circulating coin was Australian Crown at 38.5mm. Runner up was the Australian $1 silver kangaroo at 40.60mm, because it was a commemorative coin and not a circulating one.
You would need strong pockets to be carrying these large coins around which were also very heavy. The Crown weighed 28.27gm, Silver $1 kangaroo 31.6gm compared to 50 cent piece at 15.55gm.
A check of the internet shows a number of coins claim to be the biggest in the world. This is Australia’s biggest gold coin but obviously not a circulating one.
The largest gold coin (pictured below) weighs 1,012 kg ,measures 80 cm in diameter, 13 cm in thickness and is made from bullion with a purity of 99.99 per cent. The legal-tender coin was introduced on 9 February 2012 by the Perth Mint (Australia), with a face value of AUS$1 million The coin, called the "1 Tonne Australian Kangaroo" features a Kangaroo and was created to promote Australia's official Kangaroo Gold Bullion Coin series.