1870 GB & Ireland silver three-halfpence (Victoria) - proof

O’Brien Coin Guide: GB & Ireland Silver Three-Halfpence

Introduction: The ‘three-halfpence’ was the smallest silver coin ever struck by the Royal Mint for circulation. It was worth ​11⁄2d (or ​1⁄160 of a pound) and was produced for circulation in the British colonies, specifically for use in British Guiana, Ceylon (now Sri Lanka), Mauritius, Sierra Leone and the West Indies. They were a rough…