Audemars Piguet Royal Oak "Jumbo" Extra-Thin Openworked 16204XT in Titanium & BMG
The Iconic Jumbo Gets a New Material Dialogue
Audemars Piguet continues to evolve the Royal Oak "Jumbo" Extra-Thin Openworked with the introduction of reference 16204XT, combining titanium and Bulk Metallic Glass (BMG) for the first time in this iconic skeletonised model. Following the steel, white gold, and yellow gold versions, this 2026 release offers a cooler, more technical aesthetic.
Titanium and BMG Construction
The 39mm Jumbo form remains intact but replaces precious metals with titanium and BMG. BMG, a palladium-based amorphous alloy, is used for the bezel and caseback frame, where its mirror-like polish and high scratch resistance contrast with the satin-brushed titanium mid-case. The screw-locked crown is titanium, and water resistance is rated at 50 meters.
Technical Specifications
| Specification | Detail |
|---|---|
| Case Diameter | 39mm |
| Case Thickness | 8.1mm |
| Case Material | Titanium with BMG bezel |
| Dial | Rhodium-toned openworked |
| Movement | Calibre 7124 (In-house) |
| Movement Thickness | 2.7mm |
| Power Reserve | 57 hours |
| Water Resistance | 50m |
| Reference | 16204XT.OO.1240XT.01 |
The Skeletonised Dial
The openworked calibre 7124 is rhodium-toned, creating a monochromatic backdrop. Compared to earlier openworked Jumbos that relied on warmer tones, this version offers a cooler, more technical aesthetic. Blackened 18k white gold hour markers and hands with luminescent material ensure readability.
The Ultra-Thin Calibre 7124
Calibre 7124 remains one of the thinnest self-winding openworked movements in production at just 2.7mm thick. It operates at 28,800 vibrations/hour and offers a 57-hour power reserve. The openworked bridges, sharp internal angles, and alternating finishes showcase AP's skeletonisation expertise, visible from both sides through sapphire crystals.
FAQ
Q: How does the 16204XT differ from previous openworked Jumbos?
A: This is the first openworked Jumbo to use titanium and BMG, offering a cooler, more technical aesthetic compared to the warmer tones of precious metal versions.
Q: Is Calibre 7124 truly ultra-thin?
A: At 2.7mm thick, it is one of the thinnest self-winding openworked movements currently in production, though some may debate the "ultra-thin" designation for the overall watch at 8.1mm.
Q: Is this a limited edition?
A: No, it is not a limited edition but production will be tightly controlled through Audemars Piguet boutiques.
Source
Article based on reporting from Monochrome Watches (February 3, 2026).
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