Patek Philippe Perpetual Calendar 3940J “Second Series – Late Dial” – Yellow Gold (1986 / Revision 2025)

Heritage Narrative

The Patek Philippe Perpetual Calendar 3940J is one of the most historically significant and collectible perpetual calendars ever produced. Introduced in 1985, it redefined what a grand complication could be — elegant, ultra-thin, and wearable for daily use.

This example, an early Second Series – Late Dial from 1986, represents the model’s most balanced and desirable configuration. The 36 mm case in 18k yellow gold offers perfect proportions, while the silver opaline dial with recessed subdials and serif typography reflects the classical refinement of mid-1980s Patek Philippe design. Inside beats the Calibre 240 Q, powered by a 22k gold micro-rotor and showcasing one of the most celebrated automatic perpetual calendar architectures in Swiss horology.

Accompanied by its full original set and a Patek Philippe factory revision completed in 2025, this piece remains in outstanding condition and carries both historical and mechanical importance. It stands as a cornerstone reference within Patek Philippe’s lineage of grand complications — discreet, complex, and timeless.

Technical Specifications

Reference:
3940J – Second Series (Late Dial)

Year:
1986 (Factory revision 2025)

Movement:
Patek Philippe Calibre 240 Q, automatic, 22k gold micro-rotor, perpetual calendar with day, date, month, leap year, and moon phase, 48-month indication, Geneva Seal finishing

Case:
36 mm 18k yellow gold case, polished finish, sapphire crystal caseback

Bezel:
Fixed polished bezel in 18k yellow gold

Crystal:
Scratch-resistant sapphire crystal

Dial / Hands:
Silver opaline dial with recessed subdials, applied gold baton hour markers, and dauphine hands

Bracelet / Clasp:
Brown alligator leather strap with 18k yellow gold tang buckle

Water resistance:
30 m / 100 ft (factory rating)

Condition & Inclusions

Overall grade:
Pre-owned — exceptional condition following factory revision

Service status:
Patek Philippe factory revision completed in 2025; under warranty

Set:
Full set — Patek Philippe presentation box, certificate, and service documentation

Shipping & Logistics

Stored off-site and shipped fully insured within 1–3 business days. Worldwide shipping available; buyer responsible for any import duties or taxes.

Shipping & Returns

Complimentary insured worldwide shipping and a 14-day return window (watch must be returned in the same condition supplied).

Every timepiece is authenticated, time-graphed, and prepared for secure transit. All shipments include full inspection before dispatch, professional packaging, and tracking updates throughout delivery. Returns are accepted within the 14-day period for store credit or refund, subject to condition verification upon receipt.