The Audemars Piguet Royal Oak Tourbillon Extra-Thin Openworked Yellow Gold makes this model even more notable
Movement Audemars Piguet 2924 | Hand-wound | Diameter: 31.5 mm / 14 lignes | Thickness: 4.46 mm | Frequency: 21,600 vph (3 Hz) | Parts: 216 | Jewels: 25 | Tourbillon | Hours, minutes, power-reserve indicator | Power-reserve: 70 hours
Movement Audemars Piguet 2924