Patek Philippe
Perpetual Calendar 3940G | Grey Gold

Late Second Series

Regular price


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Patek Philippe
Perpetual Calendar 3940G | Grey Gold

Late Second Series

Regular price


This white gold, Patek Philippe 3940 perfectly illustrates why the reference is so coveted. Understated both in styling and case-size, it carries a 'second-series' dial, with overlapping elements from the latter part of the production series. With its modest (by today's standards) 36 mm size, and svelte profile matched by a slim, micro-rotor movement, it's arguably one of most elegant offerings of the modern Patek Philippe era.

The Industry at a juncture

The reference 3940 was introduced by Patek Philippe in 1985, at a crucial juncture. The Swiss watch industry was still feeling the effects of not only the Quartz crisis, but also a global economic downturn which resulted in massive downsizing for many watch brands, with some pivoting towards this new technology and some having to fold altogether. 

But rather than follow the wind, Philippe Stern, the CEO of Patek Philippe, decided instead to double-down on the brand’s heritage by creating the reference 3940. Alongside its sister reference, the 3970, the model essentially kick-started the serial production of complicated Patek Philippe watches. Prior to this, perpetual calendars were extremely scarce.

The reference 3940 decided to abandon the aesthetics cemented by previous references. The dial layout was revamped, with the day and month aperture being replaced with three sub-dials. The sharp lines were substituted for a smoother, more modern design. Powered by a much thinner movement, it enabled an elegant, slim case that fit tightly to the wrist.

A Classic Design

The dial has three registers, with the various functions neatly balanced out. The sub-dial at three o'clock shows the leap-year counter and the months (in English), in a slightly concave sub-register, giving depth to the lightly-brushed, opaline dial. In a similar fashion, the months and day/night indicators are placed at nine o'clock. The silver moon and stars for the moon-phase are placed at six o'clock, with the days of the month around it. Whilst more typically associated with third-series examples, the silver moon and stars are present on dials dating from approximately 1995 onwards.

The dauphine hands add a touch of sharpness to what only can be described as a beautifully executed dial. Evidence suggests that the dials for the reference 3940 were produced by Stern Frères, who provided many dials to Patek Philippe during this period. At 6 o'clock, the positioning of the Swiss sigma falls below the outer minute track, consistent with later 'second-series' examples, with the sub-dials also showing a serif font type.

This Patek Philippe 3940 features a rare, white gold case. More commonly executed in yellow gold, white metal examples are as rare as they are attractive. Indeed, the case metal further adds to the discreteness and elegance of this specific piece. During the 'second-series', the hallmarks on the reverse of the case also started to transition from only being featured on the side of the case, to being stamped both on the side and on the back of the lugs (at 5 and 7 o'clock). This particular example displays the hallmarks only on the reverse, on each of the  four lugs, marking the transition between 'second' and 'third-series' cases, where the hallmarks were no longer stamped on the side of the case.

The Movement

Representing the best of Swiss design, the movement itself is no less a technical feat. This example has a display case back, revealing the fantastic hand-finishing, the Genevian coat of arms and stripes, as well as the off-center, 22k gold micro-rotor. The ultra-thin, self-winding 240 Q base movement has been used by Patek Philippe since the 1970s, and continues to beat at the heart of their modern perpetual lines.

Timeless, elegant and discontinued - the reference 3940 is an investment for life, to be worn - and appreciated, daily.

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To find out more about the 3940, read our in-depth Collector's Guide.

Brand: Patek Philippe
Model: Perpetual Calendar Ref. 3940G-013
Movement: mechanical automatic micro-rotor 240 Q
Year: 1999 (sold)
Functions: perpetual calendar: leap year indicator, month, date, day; moonphase, day/night indicators, hours, minutes
Features: display caseback, opaline dial
Case: 36 mm 18-carat white gold
Crystal: sapphire front and back
Bracelet: Patek Philippe black alligator strap, Tokyo grained leather strap, Santorini textured saffiano strap, original white gold deployant
Box & papers: original outer box, inner winding box, Certificate of Origin, complicated watches instruction booklet, distributors booklet, The Register leaflet, leather folio, spare solid caseback and setting pin
This white gold, Patek Philippe Perpetual Calendar 3940G is preserved in excellent condition. The case shows light superficial marks throughout, with nicely defined hallmarks on the reverse of the lugs. The dial shows no visible signs of imperfection, while the blued sub-dial hands show a warm oxidation. The watch comes with its original boxes, stamped Certificate of Origin, product literature and Patek Philippe leather folio, along with the original (sealed) solid caseback and setting pin. The winding box is currently not operational. The watch is guaranteed for authenticity and comes with a two-year mechanical warranty from A Collected Man.

All of our pre-owned watches have undergone thorough mechanical inspections, including being ultrasonically cleaned, serviced and resealed if appropriate and tested for at least four days, to ensure they meet our highest timekeeping standards. Our pre-owned and vintage watches, unless stated otherwise, are covered by a full or a limited twenty-four month warranty. For example, due to their age, some vintage watches should not be subjected to the same conditions as when they were new. Please see our Terms & Conditions for further information. 

All of our new watches are covered by the warranty from the original manufacturer. Please contact us for further information.

We offer worldwide delivery on all of our watches.

If ordering from the UK or Europe before 1 PM, your watch will be sent the same working day. The courier will depend on the value of the watch, with all watches delivered the next working day.

If ordering from outside Europe, delivery will depend on choice of courier and destination. 

Please note, that prices are quoted gross of VAT (unless expressly stated otherwise) and that preowned goods (in the United Kingdom) are subject to a marginal rate of VAT, which can not be reclaimed. For further information, please see here.

You can cancel your order without giving any reason, within 14 days from the day the watch has been delivered to you.

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