Australian 1964 Pennies were minted in 1964, so as at January 2011, they are 47 years old.
All Australian Pennies issued from 1911 to 1964 inclusive weigh 9.45 grams.
With the possible exception of traders tokens (with the traders business name on them), there were no "Australian" pennies minted prior to 1911. The only Pennies circulating in Australia prior to 1911 were British Pennies.
If you refer to the "diamonds" on the obverse side of Australian Pennies (and all other Australian coins from 1953 to 1964), they are merely a spacer. The function was previously performed by a semicolon and/or a full stop on pre-1953 coins.
All Australian Pennies minted from 1938 to 1964 inclusive feature a kangaroo on the reverse. The only Australian coins to feature wheat was the 1938 to 1964 inclusive, silver Threepence coins.
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".
Such a coin does not exist. Australia was not discovered until 1770. Australian Pennies were minted in most years from 1911 to 1964 inclusive.
All Australian Pennies minted from 1938 to 1964 inclusive feature a kangaroo on the reverse. The only Australian Coins to feature wheat was the 1938 to 1964 inclusive, silver Threepence coins.
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.".
The 1949 Australian pennies are worth more than 50 United States Dollars.
You didn't specify what "1.00" refers to, so I added your question to British Coins and Australian Coins because those would be the two major countries that would probably fit. In the old British system, £1 sterling equalled 240 pence. When the decimal pound was adopted during the period 1968-71, old pennies were replaced with "new pence" worth 2.4 times as much, so there would be 100 new pennies in a pound. (FWIW, in 1982 the word "new" was dropped). The old Australian system was similar, but Australia decided to create a new currency, the Australian Dollar (A$) at the rate of A£1 = A$2; the dollar is divided into 100 cents. That is, 1 Australian dollar was worth half a pound or 120 old pennies. That meant that an Australian cent was worth 1.2 old pennies at the time of conversion.
The 1964 Australian pennies are currently more than 50 United States Dollars.
With the possible exception of traders tokens (with the traders business name on them), there were no "Australian" pennies minted prior to 1911. The only Pennies circulating in Australia prior to 1911 were British Pennies.