When was the British brass Threepence introduced?

Answer 1

The dodecagonal (12 sided) British brass Threepence was first issued in 1937.

The Edward VIII coins dated 1937 were never released into circulation and were melted down. Some coins given to vending machine manufacturers for testing purposes, were never returned.

The official first release of the brass Threepence was in 1937 with George VI.

Answer 2

The British nickel-brass Threepence was first issued for circulation in 1937 and last issued in 1967.