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

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 $13,887 median for the category. It ships on a matching titanium bracelet rather than a strap.

3 official photos · reader photos welcome

Price

≈$218,151 (CHF 175,000)

Material

Titanium

Grade / type

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

Colour

Grey

Surface treatment

Openworked; BMG bezel, caseback frame and bracelet mid-links

Finish technology

Natural finish

Caseback

BMG (frame); sapphire display back

Nickel-free

Unconfirmed (clasp or buckle material not confirmed)

Bracelet / strap

Titanium bracelet (BMG mid-links)

Matching bracelet

Standard

Crystal

Sapphire

Display back

Yes

Dial

Openworked

Availability

Offered

Status

Current (limited to 150)

Not published

Lug-to-lug, Weight, Hardness, Construction, Lume

High confidence Verified Sep 2026 Source: Audemars Piguet / Monochrome Spec checksGrade Jul 2026Price Aug 2026 medium

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