Key Highlights

• Genuine light-blue opal centre dial
• White stamped and grained outer dial
• Eleven applied diamond indexes totalling 0.0429 carat
• Signature Double Heart Beat aperture at 6 o’clock
• Swiss FC-313 automatic movement
• La Joux-Perret movement architecture
• Extended 68-hour power reserve
• Polished 36 mm stainless steel case
• Sapphire exhibition caseback
• Seven-link stainless steel bracelet
• Additional burgundy crocodile-pattern leather strap
• Quick-release interchangeable strap system
• Anti-reflective sapphire crystal
• 50-metre water resistance

The Frédérique Constant Classics Ladies Automatic Double Heart Beat [FC-313OBD3B6B] brings together the ethereal beauty of genuine opal, eleven sparkling diamond indexes and the visual theatre of a Swiss automatic movement.

At the centre of the dial is a genuine light-blue opal stone whose shifting reflections create subtle notes of blue, pink, green and white as the watch moves through the light. Because opal is a naturally expressive gemstone, its appearance continually evolves according to the viewing angle and surrounding illumination.

The opal centre is framed by a pristine white stamped and grained outer dial set with eleven applied diamond indexes totalling 0.0429 carat. At 6 o’clock, the signature Double Heart Beat aperture reveals part of the regulating mechanism beneath the dial, connecting the watch’s jewellery-inspired presentation with its mechanical character.

Powered by the automatic FC-313 calibre, developed on a La Joux-Perret base, the watch provides an impressive 68-hour power reserve. It is a sophisticated combination of gemstone artistry, traditional watchmaking and versatile everyday luxury.

The Return of the Double Heart Beat

Approximately twenty years after the debut of the original Ladies Double Heart Beat, Frédérique Constant has reimagined one of its most recognizable designs.

The intertwined aperture at 6 o’clock offers a view into the mechanical movement, allowing the wearer to observe the regulating mechanism in motion. Its graceful shape softens the technical character of the open-heart display and gives the watch a more decorative, jewellery-like personality.

The aperture also creates a natural visual balance with the eleven diamond hour indexes, occupying the position where the twelfth index would traditionally appear.

This latest generation combines that established Frédérique Constant design signature with a stronger movement, contemporary 36 mm proportions and an interchangeable bracelet-and-strap system.

The Enchanting Character of Light-Blue Opal

The genuine opal centre is the defining visual feature of the FC-313OBD3B6B.

Rather than presenting a single flat colour, opal interacts with light to create constantly changing reflections. Its soft light-blue foundation may reveal delicate flashes and tonal variations depending on the angle from which it is viewed.

The opal is surrounded by a crisp white outer dial with a stamped, grained finish. This contrast helps emphasize the gemstone’s colour while preserving excellent clarity around the applied hour markers.

As with other genuine gemstone materials, natural variations in colour and visual character should be expected and appreciated. These differences contribute to the individuality of each watch.

Eleven Applied Diamond Indexes

Eleven diamonds mark the hours around the dial, with the Double Heart Beat aperture positioned at 6 o’clock.

The diamonds have a combined weight of 0.0429 carat. Their restrained size adds brilliance without distracting from the light-blue opal centre or overwhelming the elegant proportions of the watch.

Frédérique Constant has balanced the jewellery and watchmaking elements carefully. The diamonds provide sparkle, the opal introduces natural colour, and the open-heart display reveals the mechanical movement beneath the dial.

The result feels decorative and distinctive while remaining refined enough for regular wear.

A 68-Hour La Joux-Perret-Based Movement

The watch is powered by the Swiss automatic FC-313 calibre, based on a La Joux-Perret movement.

Operating at 28,800 vibrations per hour and fitted with 24 jewels, the calibre delivers a substantial power reserve of approximately 68 hours. When fully wound, it can therefore be set aside for much of a weekend and remain running when worn again.

This extended reserve represents a meaningful advantage over many traditional Swiss automatic movements that offer approximately 38 to 42 hours of running time.

The movement can be admired from both sides. The Double Heart Beat aperture provides a view from the dial, while the transparent sapphire caseback reveals additional movement finishing and mechanical detail from the reverse.

Refined 36 mm Proportions

The polished stainless steel case measures 36 mm in diameter and 10.51 mm in thickness.

These proportions provide enough presence to showcase the opal, diamonds and Double Heart Beat display while maintaining the elegance associated with the Classics collection.

A convex anti-reflective sapphire crystal protects the dial and provides excellent resistance to everyday scratching. The sapphire exhibition caseback offers a clear view of the automatic movement.

The crown is finished with a contrasting black ceramic cabochon, adding another discreet jewellery-inspired detail to the polished steel case.

With water resistance rated to 50 metres or 5 ATM, the FC-313OBD3B6B is designed to accompany regular daily wear while retaining the character of an elegant Swiss luxury watch.

Seven-Link Stainless Steel Bracelet

The polished seven-link stainless steel bracelet gives the watch a fluid and jewellery-like appearance.

Its smaller individual links articulate comfortably around the wrist while creating multiple polished surfaces that complement the diamonds and iridescent opal dial. The bracelet is secured by a folding clasp with push buttons.

The installed bracelet measures approximately 166.88 mm in length and is approximately 17.95 mm wide at the lugs.

Frédérique Constant also includes an additional burgundy crocodile-pattern leather strap. Its deep burgundy colour offers a sophisticated contrast to the light-blue opal and white outer dial.

The quick-release system makes it easy to alternate between the steel bracelet and leather strap:

• The steel bracelet provides a polished, jewellery-inspired presentation
• The burgundy leather strap creates a warmer and more traditional dress-watch appearance

The manufacturer does not publish separate length measurements for the included burgundy strap, so those dimensions should not be stated without measuring the physical strap.

A Distinctive Alternative to Traditional Diamond Watches

Clients considering diamond-set watches from the Longines PrimaLuna, Longines Master Collection, Cartier Ballon Bleu or TAG Heuer Carrera Date families may find the FC-313OBD3B6B especially compelling.

Many comparable watches focus primarily on diamonds, brand recognition or conventional dial finishing. The Frédérique Constant adds several distinguishing features:

• Genuine light-blue opal
• Eleven applied diamond indexes
• A visible Double Heart Beat display
• A La Joux-Perret-based automatic movement
• An extended 68-hour power reserve
• A sapphire exhibition caseback
• Both a steel bracelet and additional leather strap
• Accessible positioning within Swiss luxury watchmaking

This combination gives the watch an identity that is immediately recognizable without relying on excessive ornamentation.

Designed for Important Occasions

The combination of opal, diamonds and mechanical watchmaking makes the FC-313OBD3B6B particularly appropriate for celebrating a milestone.

It can commemorate an anniversary, birthday, graduation, professional achievement or other significant occasion while remaining versatile enough to be enjoyed regularly.

The iridescent opal allows the watch to coordinate with a wide range of colours, while the interchangeable bracelet and strap make it easy to adapt its presentation.

On the stainless steel bracelet, the watch takes on the character of polished jewellery. On the burgundy leather strap, it becomes a more traditional and expressive Swiss dress watch.

Why Collectors Will Appreciate the FC-313OBD3B6B

The Frédérique Constant Classics Ladies Automatic Double Heart Beat combines visual originality with meaningful mechanical substance.

Its principal attractions include:

• A genuine light-blue opal centre dial
• Frédérique Constant’s signature Double Heart Beat aperture
• Eleven diamond indexes totalling 0.0429 carat
• A modern La Joux-Perret-based automatic movement
• An extended 68-hour power reserve
• A sapphire exhibition caseback
• Elegant 36 mm proportions
• A polished seven-link stainless steel bracelet
• An included burgundy leather strap
• A convenient quick-release system
• Strong value within the Swiss luxury category

The result is a distinctive automatic timepiece that celebrates gemstone beauty, jewellery design and Swiss mechanical watchmaking in equal measure.

Technical Specifications

• Brand: Frédérique Constant
• Collection: Classics
• Model: Ladies Automatic Double Heart Beat
• Reference: FC-313OBD3B6B
• Movement: Swiss Automatic
• Calibre: FC-313
• Movement Base: La Joux-Perret
• Power Reserve: Approximately 68 Hours
• Jewels: 24
• Frequency: 28,800 Vibrations per Hour / 4 Hz
• Functions: Hours, Minutes and Central Seconds
• Case Shape: Round
• Case Material: Polished Stainless Steel
• Case Construction: Two-Part Case
• Case Diameter: 36 mm
• Case Thickness: 10.51 mm
• Lug Width: 17.95 mm
• Crown: Stainless Steel with Black Ceramic Cabochon
• Crystal: Convex Anti-Reflective Sapphire Crystal
• Caseback: Sapphire Exhibition Caseback
• Dial: White Stamped and Grained Dial with Genuine Light-Blue Opal Centre
• Dial Feature: Double Heart Beat Aperture at 6 o’clock
• Hands: Polished Silver-Tone Hands
• Hour Markers: Eleven Applied Diamond Indexes
• Diamond Count: 11
• Total Diamond Weight: 0.0429 Carat
• Bracelet: Polished Stainless Steel Seven-Link Bracelet
• Bracelet Length: Approximately 166.88 mm
• Clasp: Folding Clasp with Push Buttons
• Additional Strap: Burgundy Crocodile-Pattern Leather Strap
• Additional Strap Length: Not Published by Manufacturer
• Strap System: Quick-Release Interchangeable System
• Water Resistance: 50 Metres / 5 ATM
• Country of Origin: Switzerland
• Warranty: 2-Year Frédérique Constant International Warranty

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