5-Axis CNC & Horological Architecture
The Custom Audemars Piguet Royal Oak Double Balance Wheel Openworked Rainbow 18K White Gold Reference 15413BC.YY.1220BC.01 is a 5-axis Swiss CNC commission machined in 18K White Gold Au750 (41.0 mm x 9.9 mm) weighing 224.1g on our Mettler-Toledo analytical balance, driven by Audemars Piguet Cal. 3132 Dual-Balance Openworked regulated to +0.5 s/d, 298 deg at 28,800 vph with a 72-hour power reserve beneath a double anti-reflective sapphire crystal.
| 01 / CNC Blueprint Entity & Reference | Audemars Piguet — Royal Oak Double Balance Wheel Openworked 41mm | Ref. 15413BC.YY.1220BC.01 | SKU: AT-AU750-15413BC.YY.1220BC.01-W461 |
|---|---|
| 02 / 5-Axis CNC Metallurgy & Gold Purity | 18K White Gold Au750 — Au750 — 75.0% Pure 18K Gold Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| 03 / Analytical Bench Weight (1:1 Reference Mass) | 224.1g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| 04 / Custom Bezel, Gem-Setting & Case Geometry | Off-Catalog 18K White Gold Au750 Bezel Set with 36 Graduated Rainbow Baguette-Cut Sapphires and 56 Brilliant-Cut VVS Diamonds on Lugs and Crown Guards • 224.1g 18K White Gold • 41.0 mm x 9.9 mm |
| 05 / Regulated Super Clone Movement Calibre | Audemars Piguet Cal. 3132 Dual-Balance Openworked — Swiss Super Clone Mechanical Calibre Regulated to +0.5 s/d, 298 deg |
| 06 / Barrel Power Reserve & Balance Frequency | 72-Hour Power Reserve • 28,800 vph (4 Hz) Free-Sprung Balance Wheel |
| 07 / Optical Sapphire Crystal (Double AR) & Sealing | Scratch-Resistant Sapphire Crystal with Double Anti-Reflective Coating • 50m / 5 ATM |
| 08 / Bespoke Dial & Integrated Bracelet Spec | 41.0 mm x 9.9 mm • Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands • Integrated 18K White Gold Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks |
Engineered inside our Geneva 5-axis CNC Audemars Piguet custom atelier, the Custom Audemars Piguet Royal Oak Double Balance Wheel Openworked Rainbow 18K White Gold Reference 15413BC.YY.1220BC.01 is machined from solid 18K White Gold Au750 billets to micron-level tolerances (41.0 mm x 9.9 mm). Every bevel, lug chamfer, and Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands is hand-finished on our watchmaker bench, yielding a certified reference weight of 224.1g verified under our Fischer XRF and Mettler-Toledo QC protocol.
How Are the 36 Graduated Rainbow Baguette Sapphires Set on Audemars Piguet Ref. 15413BC.YY.1220BC.01?
The Audemars Piguet Royal Oak Reference 15413BC.YY.1220BC.01 "Rainbow" is an off-catalog haute joaillerie chronograph crafted in 18K White Gold Au750 and set with 36 graduated spectrum baguette-cut sapphires on the bezel plus 56 brilliant-cut diamonds on the lugs and crown guards, because chromatically matched sapphire crystals require micron-level channel setting to maintain 224.1g reference mass.
5 Core CNC & Chronometric Specifications:
- Blueprint Reference: Custom Audemars Piguet Royal Oak Double Balance Wheel Openworked Rainbow 18K White Gold — Official Ref. 15413BC.YY.1220BC.01 (SKU: AT-AU750-15413BC.YY.1220BC.01-W461).
- 5-Axis CNC Metallurgy: 18K White Gold Au750 case (41.0 mm x 9.9 mm) and Off-Catalog 18K White Gold Au750 Bezel Set with 36 Graduated Rainbow Baguette-Cut Sapphires and 56 Brilliant-Cut VVS Diamonds on Lugs and Crown Guards with hand-polished chamfers.
- Verified Bench Mass: 224.1g confirmed on a Mettler-Toledo analytical gram scale prior to dispatch.
- Super Clone Calibre: Audemars Piguet Cal. 3132 Dual-Balance Openworked operating at 28,800 vph (4 Hz) with 72-hour power reserve and +0.5 s/d, 298 deg accuracy.
- Sapphire Optics & Sizing: Double anti-reflective sapphire crystal, 50m / 5 ATM sealing, and 19 wrist sizing options (14.0–22.0 cm).
Within the Audemars Piguet Royal Oak horological sub-silo, collectors also compare the Audemars Piguet Royal Oak Selfwinding 41mm Custom Tapestry Dial Deep Crystal Optics Ref. 15510ST (166.4g) and the Audemars Piguet Royal Oak Selfwinding 37mm Sapphire Caseback Spec Ref. 15450ST (132.2g).
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- Technical Research Monograph: 5-Axis Swiss CNC Milling Solid 18K Gold Watch Cases (±2um) (All 5 Journal Monographs)
- Homepage Master Register: Return to 18K CUSTOM Homepage (Complete 774-Watch Solid 18K Gold & Pt950 Register)
- All-Brands Catalogue: Explore Complete 12-Maison Horological Catalogue (/shop/)
- Metallurgical & 4K QC Verification: Fischer XRF Au750 Protocol • 3-Year Mechanical Warranty • Insured Armored Delivery
How is the 18K White Gold case of this Audemars Piguet 15413BC.YY.1220BC.01 machined?
Our Geneva CNC specialists mill the monobloc middle case, bezel, and bracelet geometry on 5-axis Swiss machining centers in 18K White Gold Au750 to achieve the authentic 224.1g reference mass.
Can the bracelet or strap be pre-sized to my exact wrist circumference?
Yes. Choose from 19 precision wrist circumference options (14.0 cm to 22.0 cm, or full unsized factory length). All removed solid links are sealed inside your presentation box.
How is the Audemars Piguet Cal. 3132 Dual-Balance Openworked tested on the atelier workbench?
We record a personalized 4K bench video showing the Audemars Piguet Cal. 3132 Dual-Balance Openworked (28,800 vph, 72-hour reserve) running at +0.5 s/d, 298 deg on our Witschi Chronoscope alongside Fischer XRF and Mettler-Toledo gram scale verification.
How many baguette-cut sapphires and diamonds are set on Audemars Piguet Rainbow Ref. 15413BC.YY.1220BC.01?
Reference 15413BC.YY.1220BC.01 features 36 chromatically graduated rainbow baguette-cut sapphires flush-set into the 18K White Gold Au750 bezel alongside 56 brilliant-cut VVS diamonds across the case lugs and crown guards, maintaining a verified total mass of 224.1g.
Custom Audemars Piguet Royal Oak Double Balance Wheel Openworked Rainbow 18K White Gold Ref. 15413BC.YY.1220BC.01
5-Axis Swiss CNC 18K White Gold Au750 • 224.1g Verified Mass • Regulated Audemars Piguet Cal. 3132 Dual-Balance Openworked