The 1912 halfcrown obverse features the head of King George V facing left, with the surrounding legend: 'GEORGIVS V DEI GRA: BRITT: OMN: REX'. The 1912 United Kingdom halfcrown reverse shows a crowned shield inside a garter. The shield represent members of the UK: the 3 lions for England, 1 lion for Scotland, a harp for Ireland. This design is surrounded by a legend reading 'FID: DEF: IND: IMP:' above, and the date below between 'HALF' and 'CROWN'.
The value of a British 1912 Half Crown coin depends on the quality and wear, supply and demand and rarity.