Royal Numismatic Society of New Zealand Decimal Coinage Medal 1967. 63 mm, Bright silver, 200 struck, hallmarked, ICOI, Royal Mint London, design by James Berry, OBE, FRSNZ. MacMaster 1967/3. Together with (ii) Royal Numismatic Society of New Zealand Decimal Coinage Medal 1967, 63 mm, Bright bronze, 500 struck, ICOI, Royal Mint London, design by James Berry OBE, FRNSNZ, MacMaster 1967/3. [2].