Patek Philippe

In-line Perpetual Calendar

Name: Patek Philippe In-line Perpetual Calendar
Brand: Patek Philippe
SKU: 5236P-001

5236P-001

Perpetual calendar reinvented — all four indications in a single clean line.

Estimated market value

$100,500

Confidence: High

An estimate from current market data — not an offer. Your actual value depends on condition, completeness, and authentication.

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Overview

The Patek Philippe 5236P-001 In-line Perpetual Calendar is a Grand Complications reference that rethinks one of horology's most storied complications by presenting the day, date, month, and leap-year cycle in a single horizontal aperture across the dial. Housed in a 41.3 mm platinum case, it pairs architectural legibility with the deep craft expected of the Geneva manufacture. The blue sunburst dial gives the linear display an immediate visual clarity that sets the reference apart from the sector-dial perpetual calendars that preceded it.

History

Introduced in 2021, the 5236P-001 marked a significant departure from Patek Philippe's long-established approach to perpetual calendar layout, where subsidiary dials or scattered apertures had been the norm for decades. The reference debuted alongside the dedicated Calibre 31-260 PS QL, developed specifically to drive the in-line display mechanism — a movement architecture that required an entirely new approach to the date-change and correction systems. Its arrival in platinum as the inaugural execution underscored the manufacture's positioning of the reference within the upper tier of the Grand Complications family. Collector reception was notably strong, reflecting both the novelty of the complication's presentation and the restrained, wearable proportions of the case.

Notable points

The in-line display arranges day, date, month, and leap-year indication within a single continuous aperture — a layout unprecedented in Patek Philippe's perpetual calendar history.
Calibre 31-260 PS QL was engineered from the ground up to support the linear display, incorporating a new instantaneous-jump mechanism for the date.
The 41.3 mm platinum case offers a relatively wearable footprint for a Grand Complications reference, balancing presence with comfort on the wrist.
The blue sunburst dial creates strong contrast against the white-printed in-line text, making the perpetual calendar indications exceptionally easy to read at a glance.
As with all Patek Philippe perpetual calendars, the mechanism accounts for months of varying length and leap years without requiring manual date correction until the year 2100.