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Patek Philippe Perpetual Calendar 3940J

Pre-owned () | Year of production 1990 | Original box | Original papers
+ RM139 insured shipping within:
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  • Return policy determined by the dealer

Shipping and Seller Information

Item is in stock
Anticipated delivery: 15/07 - 20/07
Professional dealer
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More About This Listing

Basic Info

Listing code JUEUE9
Brand Patek Philippe
Model Perpetual Calendar
Movement Automatic
Case material Yellow gold
Bracelet material
Crocodile skin
Year of production 1990 (Approximation)
Scope of delivery
Original box, original papers
Gender Men's watch/Unisex
Location Malaysia, Kuala Lumpur
Price $60,000 (= RM288,282)
Availability Item is in stock


Movement Automatic


Case material Yellow gold
Dial Silver


Bracelet material
Crocodile skin


The Ref. 3940, the watch in itself is a marvel both in its design and movement. Housing the fantastically finished in-house perpetual calendar Cal. 240 Q, one of its defining aspects is the integrated off-centre micro-rotor, allowing this incredibly complicated watch to come in at an unbelievably slim 9mm. To ensure that a rotor that small could power the watch, it was made in 22-carat gold, with the extra weight providing more force to wind the watch.

Making a perpetual calendar is no easy task, with 275 different parts and as a testament to this, at the time it was released, there were only two people in the manufacture allowed to make watches this complicated. Sure, a perpetual calendar does not enjoy the same status as a chronograph, despite being more difficult to manufacture, as it lacks the tactile experience. But for a watch to have a memory of 4 years, accounting for the days in every month including February and the leap year, involves a large measure of skill. Add a moon phase and a 24-hour clock on top and you start to understand the complexity of this.

The aesthetics of the Ref. 3940 is a masterful exercise in restraint, a timeless design combining the need for legibility with a beautiful symmetry of subdials. It has a white opaline dial with yellow gold applied index markers and dauphine hands. Each sub-dial provides two sets of information, with the 3 o’clock sub-dial showing the leap year indicator and the day of the week, the 6 o’clock sub-dial showing the enamel moon phase and the day of the month, and finally, the 9 o’clock sub-dial showing the 24-hour clock and the month. The sub-dials are systemized within concentric circles and in an obvious hierarchy, with the day, month, and date on the outer track of the sub-dial, with the less important leap year indicator, moon phase, and 24-hour clock inside it. A cool little quirk of these Ref. 3940’s is in the 24-hour subsidiary dial. In what looks to be discolouration, the orange tint of the bottom half is actually a subtle indicator to show that it is nighttime.

The 36mm curved case sits proportionately elegant on the wrist and its ultra-slim profile completes what is perhaps one of the most understated and elegant timepieces. This watch comes with the angular tang buckle, which I much prefer to the more ornamental Calatrava deployant clasp.

While it is true that the Ref. 3940 does not shout out, it is for this reason I love the watch so much. This idea that you can wear this watch with barely anyone noticing, but knowing you have something truly special on is very, very appealing to me. There is a real purity to the design where perfect symmetry was achieved, balancing both undeniable elegant aesthetics with a fantastic movement. It is no wonder this watch was in production from 1985-2006, one of the longest run in Patek’s history.


This Patek Philippe 3940J Perpetual Calendar is in very good condition.

It comes as a full set with its inner and outer box, brochures, and certificate of origin. The watch is in full working order.


Brand: Patek Philippe
Year: 1990’s
Model: Perpetual Calendar
Reference Number: 3940J
Material: 18-carat Yellow Gold
Movement: Patek Philippe Cal. 240Q, Self-Winding Micro-Rotor
Case Diameter: 36mm
Strap: Patek Philippe Chestnut Brown Alligator Strap with Signed 18-carat Yellow Gold Tang Buckle

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Escrow Service unavailable

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Return policy determined by the dealer

Return policy determined by the dealer

Please note that this dealer has their own return policy.

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Professional dealer | On Chrono24 since 2017
Kuala Lumpur, Malaysia
56 watches sold
76 active listings
Kuala Lumpur, Malaysia


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