British Decimal Coinage - half penny

issued 1971-1984. demonetised December 1984.
composition: bronze
weight: 1.78g
diameter: 17.14mm
obverse:Arnold Machin design of Queen Elizabeth II.
legend: D•G•REG•F•D•(date)||ELIZABETH•II
Dei Gratia, Regina, Fidei Defensor
(By the Grace of God, Queen, Defendor of the Faith)
used 1971-1984.

1st reverse: by Christopher Ironside.
Central crown, ˝ below, NEW PENNY above.
used 1971-1982.

2nd reverse: by Christopher Ironside.
Central crown, ˝ below, HALF PENNY above.
used 1983-1984.

1971 issued for circulation, also in Proof sets, also in the "Decimalization" blue wallets.
1972 issued in Proof sets only.
1973-1981 issued for circulation, also in Proof sets.
1982-1983 issued for circulation, also in Proof sets, also in "Mint Set" blister packs.
1984 issued in Proof sets, also in "Mint Set" blister packs.
guide for type collectors:
KM#914 (1971-1981) [obverse 1, reverse 1]
KM#926 (1982-1984) obverse 1, reverse 2]

guide for circulation strike collectors:
1971,1973,1974,1975,1976,1977,1978,1979,1980,1981,1982,1983