The Titanium Field Guide

Audemars Piguet Royal Oak Perpetual Calendar Openworked 150th Anniversary (Titanium)

26585XT.OO.1220XT.01

The Audemars Piguet Royal Oak Perpetual Calendar Openworked 150th Anniversary (Titanium) is a current-production integrated bracelet watch with a Titanium (grade undisclosed) case, finished with openworked; bmg bezel, caseback frame and bracelet mid-links. It is priced well above the $13,200 median for the category. It ships on a matching titanium bracelet rather than a strap.

Titanium integrated bracelet watchesUnder 11 mm thickOn a titanium braceletPerpetual calendarDisplay back
Price
$196,000
Titanium
Titanium (grade undisclosed)
Water resistance
20 m
Reference
26585XT.OO.1220XT.01
Type
Integrated bracelet
Case diameter
41.0 mm
Thickness
9.9 mm
Origin
Switzerland
Movement
Automatic
Caliber
AP calibre 5135
Power reserve
40 h
Complications
Perpetual calendar, Date
Case shape
Octagonal
Case colour
Natural / grey
Finish technology
Natural finish
Surface treatment
Openworked; BMG bezel, caseback frame and bracelet mid-links
Caseback
BMG (frame); sapphire display back
Nickel-free
Not verified (clasp or buckle material not confirmed)
Bracelet / strap
Titanium bracelet (BMG mid-links)
Titanium bracelet
Standard
Crystal
Sapphire
Display back
Yes
Dial
Openworked
Availability
Offered
Status
Current (limited to 150)
Not published
Lug-to-lug, Weight, Lume Help verify
High confidence Verified Jul 2026 Source: Monochrome Maker / listing ↗
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Frequently asked questions

What grade of titanium is the Audemars Piguet Royal Oak Perpetual Calendar Openworked 150th Anniversary (Titanium)?

The Audemars Piguet Royal Oak Perpetual Calendar Openworked 150th Anniversary (Titanium) has a Titanium (grade undisclosed) case with a bmg (frame); sapphire display back caseback. This is confirmed against the maker spec.

What size is the Audemars Piguet Royal Oak Perpetual Calendar Openworked 150th Anniversary (Titanium)?

It is 41.0 mm in diameter, 9.9 mm thick, and water resistant to 20 m.

How much does the Audemars Piguet Royal Oak Perpetual Calendar Openworked 150th Anniversary (Titanium) cost, and is it available?

It is current-production and lists from $196,000.

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