An 18ct gold diamond 'Aqua' automatic wristwatch, by The Royal Diamond for Chatila

An 18ct gold diamond 'Aqua' automatic wristwatch, by The Royal Diamond for Chatila The circular dial with Arabic numerals, double date aperture at '12', sweep centre seconds and subsidiary dial for 12-hour register, with diamond geometric details, to the diamond-set bezel, open glazed case back, diamond-set buckle and later leather straps, <i>European Convention mark, case 43mm wide</i> Dial and case signed The Royal Diamond, case signed 'Aqua', buckle signed 'Chatila', case no. 7 and BA100Y