AP1 Audemars Piguet Royal Oak. Reference 56175SA. Watch measures 33mm and is made from steel and yellow gold. Audemars Piguet high precision in-house quartz movement with Cotes de Geneve decoration. Sapphire crystal on the front and a closed case back. Waterproof 3ATM or 30 meters. Functions are hours, minutes, sweep seconds and date. This watch is fitted with the original steel and gold bracelet with integrated folding clasp with security link. Uncharacteristically this watch is sold without any box or papers however we guarantee authenticity. Please be aware that this watch has just been serviced and polished by our watchmaker with a new battery placed (Jan 2021). A great find and a fantastic classic Royal Oak suitable for both men and women!