Results 1 results found GMT clock and standards of length, Flamsteed House, Greenwich, UNESCO World Heritage Site, London, England, United Kingdom, Europe The Shepherd 24-hour gate clock at the Royal Observatory, Greenwich, UNESCO World Heritage Site, London, England, United Kingdom, Europe The Shepherd 24-hour gate clock at the Royal Observatory, Greenwich, UNESCO World Heritage Site, London, England, United Kingdom, Europe Meridian Line, Royal Observatory Greenwich, London, England, United Kingdom, Europe
