This share certificate of Star Explorations Limited bears a date charged with history: 15 August 1939, less than three weeks before the start of the Second World War. Issued in London in the name of Louis Duvillier for 30 shares, it represents one of the last normal stock-market transactions before the markets were upended by the world conflict. British mining exploration companies of the interwar period were numerous, operating on several continents, seeking gold, silver and rare metals in the territories of the Empire. This document, through its particular historical context, will interest both mining scripophily collectors and those passionate about the history of the Second World War and its impact on financial markets.