Recorded in our Monte-Carlo solid 18K gold Audemars Piguet register, the Audemars Piguet Royal Oak Double Balance Wheel Openworked 41mm Baguette Blue Topaz Bezel 18K White Gold Geneva Atelier Spec Reference 15412BC.TO.1220BC.01 unites authentic Geneva proportions (41.0 mm x 9.9 mm) with a certified 18K White Gold Au750 mass of 224.1g. Every detail of the Graduated Royal Blue Sunburst Dial with Solid 18K Gold Applied Hour Markers & Hands, Octagonal Brushed & Chamfered Bezel Locked by 8 White Gold Hexagonal Screws with Anti-Reflective Scratch-Resistant Sapphire Crystal, and hallmarked clasp is verified under our Fischer XRF Au750 and Mettler-Toledo laboratory protocol.

5 Core Horological & Metallurgical Specifications:

• Registered Entity & Ref: Audemars Piguet Royal Oak Double Balance Wheel Openworked 41mm Baguette Blue Topaz Bezel 18K White Gold Geneva Atelier Spec — Official Reference 15412BC.TO.1220BC.01 (SKU: MC-AU750-15412BC.TO.1220BC.01-W756).
• Precious Metal Alloy: 18K White Gold Au750 with deep mechanical hallmarking and 5-axis Swiss CNC case finishing.
• Verified Reference Mass: 224.1g confirmed on our Monte-Carlo showroom Mettler-Toledo analytical balance.
• Mechanical Calibre: Audemars Piguet Cal. 3132 Dual-Balance Openworked operating at 28,800 vph (4 Hz) with 72-hour power reserve (+0.5 s/d, 296 deg).
• Sapphire Crystal & QC: Scratch-resistant sapphire crystal with double anti-reflective coating and 50m / 5 ATM water resistance.

Within the same Audemars Piguet horological silo, collectors also compare the Audemars Piguet Royal Oak Selfwinding 41mm 18K White Gold Ref. 15510BC.OO.1320BC.01 (223.6g) and the Audemars Piguet Royal Oak Selfwinding Chronograph 41mm Baguette Blue Sapphire Bezel 18K White Gold Ref. 26240BC.SS.1320BC.01 (245.8g).