This piece belongs to the abortive 1936 coinage reform program, in which the Royal Mint was actively trialing a twelve-sided copper-nickel threepence intended to replace the small silver issue. George V died in January of that year before any decision was formally enacted, and the new format was held over until 1937, when it entered circulation under George VI. Surviving trial pieces from 1936 are consequently pattern issues — struck for evaluation, never authorized for release.
This piece belongs to the abortive 1936 coinage reform program, in which the Royal Mint was actively trialing a twelve-sided copper-nickel threepence intended to replace the small silver issue. George V died in January of that year before any decision was formally enacted, and the new format was held over until 1937, when it entered circulation under George VI. Surviving trial pieces from 1936 are consequently pattern issues — struck for evaluation, never authorized for release.