They were minted at the Philidelphi(no mint-mark), Denver(D) mints. These pennies are not rare.
In circulated condition, the presence or lack of a mint mark does not significantly change its value. US cents with no mint mark were minted in Philadelphia, where most coins are minted; therefore, cents without mint marks often are more plentiful, and have 'less' value to collectors. In the case of the 1943 steel cent, there's little extra value between the 3 mints until you get to the high grade uncirculated coins, in which case the no-mintmark coins are worth significantly more -- twice as much as the "S" mintmarks and 5 times as much as the "D" mintmarks.
A 1943 steel penny with no mintmark can be worth $.35 - $1.50
The 1943 Lincoln cent was made of steel, not the nickel. Do a Google search to find the picture you want.
U.S. coins dated before 1980 (and all pennies) that do not have a mint mark, were made in Philadelphia.
1943 steel cents with no mint mark were minted in Philadelphia, Pennsylvania USA. The value of this coin varies depending on condition. As of June 21, 2009 eBay sales show them ranging from about 3 cents each to about a dollar.
They were minted at the Philidelphi(no mint-mark), Denver(D) mints. These pennies are not rare.
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).
In circulated condition, the presence or lack of a mint mark does not significantly change its value. US cents with no mint mark were minted in Philadelphia, where most coins are minted; therefore, cents without mint marks often are more plentiful, and have 'less' value to collectors. In the case of the 1943 steel cent, there's little extra value between the 3 mints until you get to the high grade uncirculated coins, in which case the no-mintmark coins are worth significantly more -- twice as much as the "S" mintmarks and 5 times as much as the "D" mintmarks.
A 1943 steel penny with no mintmark can be worth $.35 - $1.50
No mint mark coins are produced at the Philadelphia,PA
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 1943 Lincoln cent was made of steel, not the nickel. Do a Google search to find the picture you want.
Pennies both historic and modern do not have a mintmark for coins minted at the Philadelphia mint.
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.
U.S. coins dated before 1980 (and all pennies) that do not have a mint mark, were made in Philadelphia.
S is the mint mark for San Francisco.