Rolex GMT-Master II 116759SARU Black Dial 40mm

The Rolex GMT-Master II 116759SARU is built around contrast. Its 40mm white-gold case and Oyster bracelet have the cool, understated colour of steel, while the factory bezel introduces rubies, sapphires and diamonds in a red-and-blue arrangement. The black dial keeps the centre of the watch readable and gives the stones a darker background than a pavé dial would. On the wrist, the experience is defined as much by weight as by colour. This is a dense, highly decorated GMT that feels considerably more substantial than its familiar 40mm dimensions initially suggest. Auction records identify the reference with an 18 ct white-gold case, black dial, gem-set bezel and automatic calibre 3186.

SARU Colour Split

The bezel is the reason this reference exists. “SARU” refers to the sapphire-and-ruby setting, with diamonds used to separate and complete the 24-hour scale. The result recalls the red-and-blue identity associated with classic GMT models, but interprets it through precious stones rather than aluminium or ceramic. Under direct light, the rubies and sapphires separate clearly, making the red and blue halves easy to recognise. Indoors, the colours become deeper and the bezel looks more integrated with the white-gold case. Studio photography often makes every stone appear equally bright, while normal lighting reveals more variation between individual cuts and colour tones.

The effect is expressive without covering the entire watch in diamonds. Buyers who want a gem-set Rolex but still want the underlying GMT-Master II architecture to remain obvious may find this balance more convincing than a fully pavé configuration.

Black Dial Restraint

The black dial gives the Rolex GMT-Master II 116759SARU a useful visual anchor. Applied luminous markers, white-gold surrounds and familiar professional hands remain clear against the dark surface. Christie’s and Sotheby’s examples confirm the black dial configuration paired with the white-gold case and gem-set bezel. In soft light, the dial appears calm and almost flat, drawing attention toward the bezel. Bright light increases the contrast between the glossy surface, luminous plots and polished hands. Reflections can briefly interfere with the date magnifier, but the central time display remains much easier to read than on a diamond-pavé dial.

That restraint also helps with clothing. The red-and-blue stones are visually strong, yet the black dial prevents the watch from becoming difficult to pair with dark tailoring or simple evening wear.

White-Gold Mass

The 40mm case uses the broad six-digit GMT-Master II proportions, with substantial lugs, crown guards and a solid Oyster bracelet. Its white-gold construction gives it considerably more mass than an Oystersteel GMT, even though the colour appears similar from a distance. Phillips, Christie’s and Sotheby’s all record the reference at 40mm with an 18 ct white-gold Oyster bracelet.

Correct sizing matters because the heavy case can move noticeably if the bracelet is worn loose. When fitted closely, the bracelet distributes the weight well and the watch feels stable rather than top-heavy. The cool metal colour is one of the reference’s strengths. It allows the bezel stones to provide the colour without adding the warmth of yellow gold. The compromise is discretion: although white gold may resemble steel at first glance, the gem-set lugs, crown guards and bezel make this an unmistakably conspicuous watch.

Travel Mechanics

Inside is the automatic Rolex calibre 3186, a 31-jewel GMT movement used in this generation of the collection. It provides an independently adjustable local hour hand, a 24-hour reference hand, date display and centre seconds. Sotheby’s and Phillips identify calibre 3186 in documented examples of the reference.

The local hour hand can move forward or backward in one-hour steps without disturbing the minute hand. This allows the wearer to change local time while keeping the GMT hand set to home time. The date follows the local hour hand across midnight.

Its approximately 48-hour reserve is adequate for regular wear, though less convenient than the longer reserve offered by current-generation GMT movements. The complication remains practical, but the watch’s value and gem setting make it less likely to be treated as an unrestricted travel tool.

SARU or SA?

The closest comparison is the Rolex GMT-Master II 116759SA. Both use white gold, a 40mm case, a gem-set exterior and calibre 3186. The main difference is colour. The 116759SA uses diamonds and sapphires, while the 116759SARU adds rubies to create the stronger red-and-blue bezel identity. Phillips and Christie’s document the 116759SA with white gold, diamonds and sapphires.

The SA feels cooler and more monochromatic. The SARU is more recognisable as a precious-stone interpretation of a classic GMT colour scheme. Buyers who prefer tonal sparkle may favour the SA; collectors who want the bezel to communicate its GMT identity immediately will usually find the SARU more distinctive.

The Right Owner

The Rolex GMT-Master II 116759SARU suits an established collector who already understands the standard GMT-Master II and wants a rare factory-set variation. It works best as part of a rotation rather than as the only daily watch. It is not ideal for someone seeking anonymity, low-maintenance ownership or a lightweight travel companion. The stones, polished surfaces and white-gold bracelet require careful handling, secure storage and serious attention to originality.

Its purpose is clear: it combines a recognisable travel-watch layout with a bezel that turns the traditional red-and-blue GMT language into fine jewellery. For the right buyer, that unusual combination is exactly what separates it from a conventional white-gold sports watch.