18 ct. yellow gold. Automatic. Gold coloured dial with engraved ornament, weekday and date, moonphase, labelled "Audemars Piguet Automatic Swiss Made". Backside marked "Royal Oak, No. 351. Folding clasp 750 Audemars Piguet & Co Swiss". With box, papers of 1984 and pendant. Diameter 36 mm, weight c. 160 g.