An Eireann (Irish) 1928 bronze Halfpenny (pig), uncirculated and in absolute mint condition could fetch up to £38 GBP. If it has been circulated but still in good condition, it might fetch anything from £2 to £12 GBP.
An Eireann (Irish) 1928 bronze Halfpenny (pig)(Proof FDC), uncirculated and in absolute mint condition could fetch up to £40 GBP.
A reputable coin dealer will be able to give a more accurate valuation.
It is a bit difficult to read, but you possibly refer to the Irish word "Saorstat". "Saorstat Eireann" translates to "Irish Free State" and appears on all Irish coins from 1928 to 1937 inclusive.
An Eireann (Irish) 1933 bronze Halfpenny (pig), uncirculated and in absolute mint condition could fetch up to £500 GBP. If it has been circulated but still in good condition, it might fetch anything from £6 to £65 GBP. An Eireann (Irish) 1933 bronze Halfpenny (pig)(Proof FDC), uncirculated and in absolute mint condition could fetch up to £500 GBP. A reputable coin dealer will be able to give a more accurate valuation.
An Eireann (Irish) 1937 bronze Halfpenny (pig), uncirculated and in absolute mint condition could fetch up to £50 GBP. If it has been circulated but still in good condition, it might fetch anything from £2 to £12 GBP. An Eireann (Irish) 1937 bronze Halfpenny (pig)(Proof FDC), uncirculated and in absolute mint condition could fetch up to £400 GBP. A reputable coin dealer will be able to give a more accurate valuation.
An Eireann (Irish) 1935 bronze Halfpenny (pig), uncirculated and in absolute mint condition could fetch up to £160 GBP. If it has been circulated but still in good condition, it might fetch anything from £3 to £30 GBP. An Eireann (Irish) 1935 bronze Halfpenny (pig)(Proof FDC), uncirculated and in absolute mint condition could fetch up to £500 GBP. A reputable coin dealer will be able to give a more accurate valuation.
Such a coin does not exist. Eireann (Ireland) was using the British based Pounds, shillings and pence currency system in 1928.
There were no 1929 Eireann (Irish) Sixpences minted.
The Irish (Eireann or Eire) Threepence had a Hare on the reverse from 1928 to 1967.
The Woodcock was on the reverse of the Eireann/Eire (Irish) Farthing coins from 1928 to 1966.
There were was no Australian 1956 Halfpenny minted.
The last Australian Halfpenny was minted in 1964.
The last Australian Halfpenny was issued in 1964.
The last Australian Halfpenny was minted in 1964.