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1956 Australian Pennies minted at the Melbourne Mint have no mintmark. 1956 Australian Pennies minted at the Perth Mint have a dot (.) after the Y in PENNY (PENNY.)
An Australian 1953 Penny minted in Perth has a dot (.) after the (A) in AUSTRALIA (AUSTRALIA.). All other Pennies were minted in Melbourne and have no mintmark.
Australian Pennies from 1955 to 1964 inclusive were minted at either or both of the Melbourne Mint and the Perth Mint. Pennies minted at the Melbourne Mint have no mintmark. 1956 Pennies minted at the Perth Mint can be identified by a dot "." after the "Y" in PENNY, eg. "PENNY.".
Please check your coin. All Australian 1920 Pennies were minted at either the Melbourne or Sydney Mints. None were minted in London or Calcutta.
Australian 1920 pennies were minted in both Melbourne and Sydney. On the reverse side underneath the word "PENNY", is a scroll. Coins minted in Melbourne will have a small dot under the scroll, coins minted in Sydney will have a small dot above the scroll. Some coins have no dot and could have been minted at either the Melbourne or Sydney Mints. The "no dots" coins are classified as rare. This means of determining the mint, only applies to 1920 pennies.
The majority of Australian Pennies with no Mint Mark were minted at the Melbourne Mint. The Sydney Mint was closed in 1926. All other Australian Pennies will have one of a variety of Mint Marks on them indicating that they were either minted at the Perth Mint, or a variety of foreign Mints.
Australian Pennies from 1955 to 1964 inclusive were minted at either or both of the Melbourne Mint and the Perth Mint. Pennies minted at the Melbourne Mint have no mintmark. Pennies minted at the Perth Mint can be identified by a dot "." after the "Y" in PENNY, eg. "PENNY.". In other years, Perth Mint Pennies can also be identified by a dot after the "A" in AUSTRALIA, eg. "AUSTRALIA." or, a dot between the designers initials "K.G".
The Australian 1943 Penny was minted variously at the Melbourne Mint (no mintmark), Perth Mint (mintmark is a dot after the Y in PENNY "Y.") and Bombay Mint (mintmark is an "I" under King George's bust).
Australian coins minted at the Melbourne Mint do not have a mintmark.
The last Australian Penny was minted in 1964.
The 1922 Australian Penny has no mintmark. Actual mintages were Melbourne - 9,529,440 and Perth - 3,168,000. Identical dies were used so the issuing mint for a particular 1922 Penny cannot be determined.
Australian Threepences minted from 1910 to 1915 were minted at the Royal Mint London and have no mintmark. Australian Threepences minted from 1916 to 1926 were minted at either the Sydney Mint or the Melbourne Mint. Sydney Mint coins have no mintmark, the coins minted at the Melbourne Mint and have an "M" below the date. Australian Threepences minted from 1927 to 1941 were minted at the Melbourne Mint and have no mintmark. Australian Threepences minted from 1942 to 1944 were minted at the Melbourne Mint, the San Francisco Mint (USA) and the Denver Mint (USA). The coins minted at the Melbourne Mint have no mintmark. Coins minted at the San Francisco Mint will have an "S" below the units digit of the date. Coins minted at the Denver Mint will have a "D" below the units digit of the date. Australian Threepences minted from 1947 to 1964 were minted at the Melbourne Mint and have no mintmark. Some Australian Threepences minted in 1951 were minted at the Royal Mint London. The mintmark is "PL". The "P" appears above the first "E" in "THREE", the "L" appears above the "E" in "PENCE".