Harry Winston Presents the Ocean Collection Tourbillon GMT Worldtimer
Harry Winston unveils a version of its Ocean Collection Tourbillon GMT Worldtimer adorned with brilliant diamonds and sapphires, showcasing the brand’s mastery in the realm of high-end mechanical watchmaking. Powered by a tourbillon regulator, this extraordinary timepiece allows the wearer to traverse global time zones with effortless sophistication. Limited to just five pieces, the Tourbillon GMT Worldtimer displays two time zones simultaneously—a masterful fusion of practical GMT functionality, the captivating allure of a tourbillon, and Harry Winston’s exceptional gem-setting expertise, making it the perfect companion for the global traveler.
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Equipped with Complications
Featuring a luxurious gold case with a modern, asymmetrical design, this Ocean Collection timepiece highlights some of the most coveted complications in watchmaking. Both sporty and robust, the Ocean Collection Tourbillon GMT Worldtimer integrates two highly esteemed complications. The tourbillon—conceived in the early 19th century to counteract the effects of gravity on a pocket watch movement—remains one of the most refined and complex feats in horology. The GMT function, which gained prominence alongside the rise of commercial aviation, enables pilots and globetrotters to view both local time and home time at a glance. By artfully combining the historic tourbillon with a GMT function, Harry Winston caters to the connoisseur’s passion for traditional complications while offering a highly practical feature.
Invisible Gem-Setting
A true testament to Harry Winston’s artistry, this timepiece is set with diamonds and sapphires using the brand’s signature "invisible setting" technique. As one of the most challenging methods of gem-setting, the invisible technique allows stones to be set seamlessly, with no visible metal framework. In this new Ocean Collection GMT Tourbillon, the addition of vibrant color elevates the invisible setting technique to an entirely new level. While the "invisible setting" technique—a method where no metal prongs are visible—is challenging to execute on a flat surface, applying it to a curved, three-dimensional form is exponentially more difficult. This is precisely the case with this 46mm white gold timepiece. Viewed from the front, 66 baguette-cut diamonds, invisibly set across the bezel and lugs, merge into a seamless, radiant display. Yet, a slight shift in the watch’s angle reveals a hidden layer: 78 baguette-cut sapphires nestled beneath the diamonds on the lower half of the bezel and the sides of the case. This stunning dual-layered setting—a rarity in the world of watchmaking—serves as a tribute to Mr. Harry Winston’s legendary high jewelry heritage, demanding an extraordinary level of precision.
Local Time and Home Time
The dial of the Ocean Tourbillon GMT is adorned with blue ruthenium crystals, while its three sub-dials sparkle with a total of 185 baguette-cut diamonds and 35 baguette-cut sapphires. The local time display is framed by a double row of diamonds and features a black onyx chapter ring punctuated by striking sapphire hour markers. At 12 o’clock, the largest sapphire—an emerald-cut stone—pays homage to Mr. Winston’s personal favorite diamond cut. At 6 o’clock, an open-worked aperture reveals the dynamic motion of a one-minute tourbillon, which is itself embellished with rows of baguette-cut diamonds and equipped with a blue hand to track the passing seconds. The home time display is equally captivating; framed by diamonds, it features larger baguette-cut diamonds at 15-minute intervals against a black onyx chapter ring, with a blue aventurine day/night indicator encircled by a ring of sapphires.
Intuitive Design for Seamless Travel
The three off-center sub-dials are a signature design element of the Ocean collection. The largest dial displays the local time, while a sub-dial at the 9 o’clock position can be set to "home time"—or any other time zone of the wearer’s choosing. This home-time sub-dial also incorporates a day/night indicator, a practical feature that helps ensure one does not inadvertently disturb friends or loved ones during the late-night hours. Designed for simplicity and ease of use, the watch allows for local time adjustments via the crown, while a button on the side of the case controls the home time and day/night display. A second button, positioned below the crown, advances a rotating disc engraved with the names of 24 cities, enabling the quick selection of a city corresponding to a second time zone. At the 6 o’clock position, an aperture reveals a tourbillon, which rotates continuously with a captivating, dynamic grace.
A Powerful Movement
This timepiece is powered by an exceptional Swiss self-winding movement with a 110-hour power reserve, ensuring precise timekeeping. Through the sapphire crystal case back, one can admire the movement and its white gold oscillating weight—both adorned with traditional hand-applied decorative finishes that showcase masterful craftsmanship. The Ocean Tourbillon GMT comes on an elegant blue alligator leather strap that conforms comfortably to the wrist, secured by an 18K white gold folding clasp set with 24 baguette-cut diamonds.
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Technical Specifications:
Name: Ocean Tourbillon GMT Worldtimer
Reference: OCEATG46WW002
Movement
Caliber: HW1005
Type: Tourbillon GMT
Jewels: 34
Frequency: 28,800 vibrations per hour (4 Hz)
Balance Spring: Flat silicon balance spring
Finishing: Circular Côtes de Genève, black DLC treatment, circular-grained gear train, hand-chamfered edges
Power Reserve: Up to 110 hours
Oscillating Weight: White gold
Functions: Hours/minutes, GMT, day/night indicator, city display, tourbillon with seconds indicator
Case
Material: 18K white gold
Dimensions: Diameter: 46mm; Thickness: 15.5mm
Crystal: Sapphire crystal with anti-reflective coating on both sides
Case Back: Open, sapphire crystal
Crown: Screw-down
Water Resistance: 5 bar (50 meters)
Case Gem-setting: 66 baguette-cut diamonds, 78 baguette-cut sapphires
Dial
Material
Blue "nail-head" textured crystal; tourbillon sub-dial at 6 o'clock set with baguette-cut diamonds
Second time zone (hours/minutes) sub-dial at 9 o'clock, set with baguette-cut diamonds and onyx; day/night indicator featuring blue aventurine
Local time sub-dial at 3 o'clock, set with baguette-cut diamonds and onyx
Dial Gem-setting
185 baguette-cut diamonds
35 baguette-cut sapphires
1 emerald-cut sapphire
Strap/Bracelet
Strap: Blue alligator leather
Buckle Material: 18K white gold
Buckle Gem-setting 24 baguette-cut diamonds
Basic Information
Gemstone Setting
275 baguette-cut diamonds (approx. 11.95 carats)
113 baguette-cut sapphires (approx. 9.28 carats)
1 emerald-cut sapphire (approx. 0.09 carats)





