Desk Clock 27000M

In Context

The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse.

The movement is hand-wound, so winding it becomes part of the day rather than something the watch does for you. 744 hours of reserve puts it well past a weekend — several days off the wrist and it is still going. At 28,800 vph the seconds hand advances 8 times a second.

27000M-001 stands on its own in this catalogue — no other reference here shares its base number. It carries a silver case.

The Patek Philippe calibre 86-135 PEND S IRM Q SE is a manually wound manufacture movement developed specifically for complicated desk clocks. The rectangular movement measures 135 × 86 mm and has a height of 28.55 mm. It consists of 912 components, is fitted with 83 jewels, and delivers a power reserve of 31 days. The movement operates at a frequency of 28,800 semi-oscillations per hour (4 Hz) and is equipped with a Gyromax® balance paired with a Spiromax® balance spring. A constant-force mechanism is integrated to stabilise energy delivery, enabling a rate accuracy of approximately ±1 second per day over the full running period. Calibre 86-135 PEND S IRM Q SE incorporates a perpetual calendar with indications for day, date, month, leap-year cycle, day/night display, and moon phases, the latter calculated to deviate by one day only after 122 years. A weekly calendar is included, with the week number displayed via a mobile frame in accordance with ISO 8601. Timekeeping functions comprise hours and minutes displayed on a subsidiary dial, a large central jumping seconds hand, and a central power-reserve indication calibrated for the full 31-day autonomy. The movement is manually wound via a removable key and features a stop-seconds mechanism that halts the seconds hand during time setting. Finishing and construction meet the requirements of the Patek Philippe Seal, covering technical execution, precision, and long-term serviceability.