King George V appeared on all British Coins and the coins of most British Empire/Commonwealth countries from 1911 to 1936 inclusive.
I don't know when it was originally built, but it was widened about 1933
The British Halfpenny coin featured Britannia on the reverse for hundreds of years. The obverse featured the reigning King or Queen.
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 Australian 1942 Halfpenny minted in Melbourne, has no mintmark. An Australian 1942 Halfpenny minted in Perth has a dot (.) after the (Y) in PENNY (PENNY.). An Australian 1942 Halfpenny minted in Bombay has an (I) below the King's head.
King Zilch - 1933 was released on: USA: 11 June 1933
A king and a ship is probably a British halfpenny, dated 1937 through 1952, featuring King George VI.
Old King Cole - 1933 was released on: USA: 29 July 1933
Bosko the Speed King - 1933 was released on: USA: 22 March 1933
Soldiers of the King - 1933 was released on: UK: March 1933 USA: 30 May 1934
Soldiers of the King - 1933 is rated/received certificates of: UK:U
King Klunk - 1933 is rated/received certificates of: UK:H
King George II Halfpennies varied in size from 28 to 30mm in diameter.