This is a semi-key date coin and values depend on grade. I can't see the coin so a ball park value is, circulated coins retail from $75.00-$140.00 and uncirculated coins start at about $165.00.
value of irish penny 1931
I presume that you are referring to a circulated US 1931 cent with no mintmark under the date, rather than a British penny. The answer then is almost certainly under a dollar.
It is worth a penny
The 1931-S has the lowest mintage of that decade.
Assuming you mean Wheat penny's, the 1909-S V.D.B., 1914-D & 1931-S are the icons of the series.
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.
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.
The value of this penny is simply one cent.CorrectionA 1931 US cent is worth more than face value, and depending on condition can be quite valuable. Please see the Related Question for values. Also note that ALL American pennies are one-cent coins. The two names are synonyms.
This is a semi-key date coin and values depend on grade. I can't see the coin so a ball park value is, circulated coins retail from $75.00-$140.00 and uncirculated coins start at about $165.00.
Between $3 and $54. In the future please add a condition of the coin so I can value it more precisely for you.
5¢ in average condition.