Openworking makes its come back in the Royal Oak collection with a dedicated movement, Calibre 7124. The slate grey mainplate and bridges provide an elegant contrast with the 18-carat pink gold case and bracelet. CASE: MATERIAL: 18-carat pink gold WATER RESISTANCE: 50 m SIZE: 39 mm DIAL: Openworked slate grey dial, pink gold applied hour-markers and Royal Oak hands with luminescent coating. BRACELET: 18-carat pink gold bracelet with AP folding clasp. Calibre 7124: Functions: Hours and minutes. Number of jewels: 31 Mechanism: Selfwinding Power reserve: 52 h Total diameter 29.6 mm Number of parts: 211 Frequency: 4 hz 28800 vph