Please check your coin again and post a new, separate question. A "leaf penny" would most likely be a Canadian cent which has a maple leaf on one side. However, an S mint mark indicates the San Francisco Mint and so could only have been used on a US coin.
It is worth a penny
The value of a 1912 s penny depends greatly on the condition of the penny. In poor condition, it is only worth a penny, but in very good condition it may be worth $10 or more.
1930 Wheat penny: with no mint mark, in good condition is worth $0.10, uncirculated is worth $10.00. With D mint mark, in good condition is worth $0.15, uncirculated is worth 25.00. With S mint mark, in good condition is worth $0.15, uncirculated is worth $13.00.
In order to give an estimate of the value of a penny, the mintmark and the date are needed. There are many, many "S" mint pennies, each with its own value.
1945 S Wheat Penny. CoinTrackers has estimated the 1945 S Wheat Penny value at an average of 15 cents, one in certified mint state (MS+) could be worth $6.
Noddy
Date? grade? is it US?
$0.27 usd
3 cents.
From $ .20 -$6.00 .
5¢ in average condition.
$10,000