Audemars Piguet Royal Oak Jumbo Extra-Thin Openworked 16204XT - Titanium and BMG
Audemars Piguet Expands Royal Oak Jumbo Openworked Family with Titanium and BMG
Audemars Piguet has introduced a striking new member to the Royal Oak "Jumbo" Extra-Thin Openworked collection with reference 16204XT. Released on February 3, 2026, this timepiece marks the first combination of titanium and Bulk Metallic Glass (BMG) palladium-based amorphous alloy in the iconic 39mm Jumbo silhouette, creating a dialogue between technical materials and classical watchmaking.
Material Innovation: Titanium Meets BMG
According to Monochrome Watches, the 16204XT maintains the familiar 39mm Jumbo dimensions (8.1mm thick) while introducing a revolutionary material combination. BMG is used for the bezel and caseback frame, where its mirror-like polish and exceptional scratch resistance create a striking contrast with the satin-brushed titanium mid-case. This interplay of finishes—matte brushed titanium against liquid-like polished BMG—delivers both visual drama and practical durability.
Technical Specifications
| Specification | Details |
|---|---|
| Case Diameter | 39mm |
| Case Thickness | 8.1mm |
| Water Resistance | 50 meters |
| Movement | Calibre 7124 (in-house ultra-thin openworked) |
| Movement Thickness | 2.7mm |
| Power Reserve | 57 hours |
| Frequency | 28,800 vph (4Hz) |
| Components | 211 parts, 31 jewels |
| Reference | 16204XT.OO.1240XT.01 |
Openworked Dial Design
The rhodium-toned openworked Calibre 7124 creates a monochromatic backdrop, distinguishing this model from earlier openworked Jumbos that relied on warmer tones. Blackened 18k white gold hour markers and Royal Oak hands, filled with luminescent material, ensure excellent legibility against the skeletonized movement. A silver-grey inner bezel with minute markings frames the openworked calibre, separating the mechanical heart from the case architecture.
Movement Excellence: Calibre 7124
The Calibre 7124 remains one of the thinnest self-winding openworked movements in production at just 2.7mm thick. Operating at 28,800 vibrations per hour with a 57-hour power reserve, the movement showcases AP's skeletonization expertise through hand-chamfered bridges with sharp internal angles, satin brushing, and polished accents. The openworked rotor, barrel bridge, and balance bridge feature a pink gold tone, adding warmth to the otherwise cool aesthetic.
Availability and Market Position
Like its predecessors, the Royal Oak Jumbo Extra-Thin Openworked 16204XT is not a limited edition, but production will be tightly controlled through Audemars Piguet boutiques. Following the steel (16204ST), white gold (16204BC), and yellow gold (16204BA) versions, this titanium/BMG model offers a distinctly modern interpretation of the skeletonized Jumbo concept.
Frequently Asked Questions
Q: What is Bulk Metallic Glass (BMG)?
A: BMG is a palladium-based amorphous alloy characterized by mirror-like polish, exceptional scratch resistance, and a liquid-like appearance. AP uses it for bezels and caseback frames to create visual contrast with brushed metals.
Q: How does this compare to the steel Jumbo Openworked?
A: The titanium/BMG combination offers a cooler, more technical aesthetic compared to the warmer steel version, while maintaining identical 39mm x 8.1mm dimensions and the same Calibre 7124 movement.
Q: Is the crown screw-locked?
A: Yes, the titanium crown features AP's screw-locked system for water resistance, consistent with the Jumbo collection's specifications.
Source: According to Monochrome Watches
Learn more about skeleton watch techniques and Royal Oak Jumbo history.