MALAYA AND BRITISH BORNEO. 50 Cents, 1957-KN. Kings Norton Mint. PCGS SPECIMEN-65 Gold Shield. KM-4.1. Steely gray and lustrous, this shimmering Gem offers seemingly flawless surfaces that are exceptionally radiant and wondrous. Tied with just one other specimen for the finest seen by PCGS. Ex: Kings Norton Mint Collection.