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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchThe Audemars Piguet Royal Oak “Jumbo” Extra-Thin Openworked is the 16204 family, introduced in 2022 as an openworked return for the Royal Oak’s 50th anniversary. Its defining feature is the self-winding Calibre 7124: a 2.7 mm-thick movement with no date display, whose bridges and mainplate are cut and finished to reveal the mechanism. For the pink-gold reference 16204OR.OO.1240OR.01, AP lists a 39 mm case, 8.1 mm overall thickness and 50 m water resistance.
What does reference 16204 mean?
16204 is the reference family for the modern Royal Oak “Jumbo” Extra-Thin Openworked. Audemars Piguet presented it in 2022, the Royal Oak’s 50th-anniversary year, with a movement designed specifically for the openworked watch: Calibre 7124. The 2022 launch account discusses stainless-steel and pink-gold versions; the broader set of materials now surfaced in AP’s catalogue is not limited to those original launch variants.
The 16204 is distinct from the 16202. AP’s heritage account describes the 16204 as the openworked model powered by Calibre 7124, while the 16202 replaced the 15202 with Calibre 7121. The references therefore identify different configurations, not interchangeable names for the same watch.
Why is it called “Jumbo”?
“Jumbo” is a historical nickname, not a suggestion that the watch is unusually large by modern standards. AP Heritage says the original 39 mm Royal Oak, launched in 1972, was considered oversized against the men’s-watch norm of its time. The nickname endured for extra-thin 39 mm Royal Oak models.
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How is the openworked Calibre 7124 made?
Openworking removes material from the movement’s mainplate and bridges to expose its construction while retaining the components and structure needed for the movement to function. AP says the parts begin with geometries cut by CNC machining, then are refined by electrical discharge machining before traditional finishing and decoration.
Audemars Piguet reports that the movement has 324 V-angles, all finished by hand. That is the manufacturer’s published count and description of the finishing, rather than an independently verified measurement. The result is a view through the movement rather than a conventional dial-and-date layout: Calibre 7124 displays hours and minutes and has no date indication.
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Calibre 7124 and case specifications
The figures below combine AP’s anniversary feature and the specification page for the specific pink-gold reference 16204OR.OO.1240OR.01. Case measurements should be read as applying to that cited reference, not automatically to every material variant.
| Specification | Published value | Scope |
|---|---|---|
| Reference family | 16204 | AP product and heritage material |
| Case diameter | 39 mm | Pink-gold reference 16204OR.OO.1240OR.01 |
| Case thickness | 8.1 mm | Pink-gold reference 16204OR.OO.1240OR.01 |
| Water resistance | 50 m | Pink-gold reference 16204OR.OO.1240OR.01 |
| Movement | Self-winding Calibre 7124; hours and minutes | Official AP product material |
| Movement thickness | 2.7 mm | AP’s 2022 anniversary feature |
| Power reserve | 52 hours | Calibre 7124 specification on the cited product page |
| Jewels | 31 | Calibre 7124 specification on the cited product page |
| Parts | 211 | Calibre 7124 specification on the cited product page |
| Frequency | 4 Hz (28,800 vibrations per hour) | Calibre 7124 specification on the cited product page |
| Hand-finished V-angles | 324 | Count reported by AP in its 2022 anniversary feature |
How do the 16204 variants differ?
AP’s 2022 return article describes a monochromatic stainless-steel version and a pink-gold version whose movement components are slate grey. AP’s current iconic-model catalogue also surfaces 16204 references in yellow gold, white gold and titanium, as well as steel. Catalogue listings establish that these variants are represented in AP’s catalogue; they do not establish current boutique stock or availability in a particular region.
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For a comparison, identify the complete reference and material rather than relying on “16204” alone. The case and bracelet material, movement appearance and reference-specific published specifications are the useful points to check. The cited full specification set in the table is for pink-gold 16204OR.OO.1240OR.01; AP’s 2022 article provides the launch-era material and movement-appearance descriptions.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price and availability
Current price, regional availability and boutique inventory are not established by the cited AP pages. For a current quotation, check with a local Audemars Piguet boutique or a dealer whose status you can verify, and specify the exact 16204 reference and material. A catalogue result alone should not be read as evidence that a watch is in stock.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
