Australian pennies dated 1924 were minted in Melbourne and Sydney. The coins
exhibit two die pairings and a common variety.
The variety with the Calcutta obverse is quite scarce, probably fewer than 3% of coins were minted with that die and according to John Sharples, all of those are believed to have been struck at the Sydney Mint.
P24MS.1A P24S.1C Obverse
London Calcutta Reverse
London London Mint
Melbourne Sydney M+S Sydney Mintage
2,649,840 2,016,000 4,665,840 (included)
P24MS.1A and P24S.2A|
All 1924 pennies have the same reverse.
The pictures on the left show a common variation of the 1924 penny. The protrusion
on the die which punched the hole in the 4 was fairly thin and had a tendency to
flatten so that the hole became a shallow depression. As the coins struck with the
flattened die circulated, the 4 wore down to the level of the depression and so
became a solid block.|
The top picture shows a normal 4 with a well-defined hole, probably struck from
a fresh die. The second picture shows a shallow-hole 4 partly worn down whereas
the bottom picture shows a completely filled 4.