The Original Gem-Set GMT Icon

Introduced as an off-catalog masterpiece to celebrate the 50th anniversary of the GMT-Master line, the Rolex GMT-Master II SARU Reference 116758SARU in 18k yellow gold is one of the most recognizable high-jewelry tool watches ever produced. Its name “SARU” derives from its bi-directional rotating bezel set with 18 baguette blue sapphires, 18 baguette rubies, 23 baguette diamonds, and 1 triangular diamond at 12 o’clock—recreating the iconic “Pepsi” blue and red colorway using precious gemstones.

Because factory SARU models command massive six-figure premiums on the global secondary market, dishonest dealers frequently modify standard 18k yellow gold GMT-Master II models (such as Ref. 116710 or 116718LN) with third-party gem-set bezels and custom pavé lugs.

Custom “SARU-Style” Bezel Conversions and Lug Modifications

  • What is the problem? Unscrupulous grey-market brokers take standard yellow gold GMT-Master II references, install aftermarket sapphire/ruby/diamond bezels, and drill/set diamonds into the lugs and crown guards to imitate an authentic factory 116758SARU.
  • Why does it happen? The value difference between a standard yellow gold GMT-Master II and a genuine factory 116758SARU can exceed $100,000 to $200,000, creating strong financial incentives for aftermarket alterations.

The Ref. 116758SARU Authentication Matrix

Before executing a bank wire or signing a private escrow contract for a Rolex GMT-Master II SARU 116758SARU, inspect these key physical attributes:

Inspection Area Factory Original Benchmark Aftermarket / Custom Conversion
Baguette Gem-Set Bezel 18 sapphires, 18 rubies, and 24 diamonds set with seamless color transition, uniform stone height, and invisible channel settings. Mismatched ruby clarity, uneven sapphire color saturation, visible setting glue, or loose channel prongs under 10x loupe.
Diamond Lug & Guard Pavé Factory-set brilliant-cut diamonds across the 4 lugs and crown guards aligned in perfectly symmetrical parallel rows. Asymmetrical diamond placement, rough metal edges around pave beds, or unpolished drill holes.
Guarantee Card Reference Serial-matched guarantee card explicitly cites reference code 116758SARU. Guarantee card references standard models like 116718LN or omits the SARU gem-setting suffix code.

A 4-Step Secondary Market Buying Protocol

If you are committing six-figure capital to acquire a factory Rolex GMT-Master II SARU, enforce this strict buyer-protection workflow:

  • Step 1: Audit Guarantee Card Reference & Suffix Code: Verify that the original guarantee card explicitly states 116758SARU. Never accept verbal claims of “factory set” if the papers cite a standard black ceramic model.
  • Step 2: Mandate Independent Gemological Inspection in Escrow: Send the watch to an accredited vault where a master gemologist inspects the 18 sapphires, 18 rubies, and 24 bezel diamonds under 20x magnification to confirm natural origin and factory channel-setting precision.
  • Step 3: Verify Calibre 3186 GMT Movement Functionality: Inspect the automatic movement to ensure smooth independent hour hand adjustment (jumping local hour) and check the date change mechanism at midnight.
  • Step 4: Check Gold Hallmarks Under Loupe: Verify the St. Bernard dog head, 750 gold scales, and Rolex Crown hallmarks stamped beneath the lugs and Oyster clasp to ensure deep, crisp outlines without buffed edges.

Final Verdict

The Rolex GMT-Master II SARU Ref. 116758SARU in 18k Yellow Gold is a legendary synthesis of high-jewelry artistry and dual-time functionality. By demanding explicit guarantee card reference matching, auditing gemstone channel settings in escrow, and checking movement jump-hour functionality, you protect your capital and acquire a true factory jewel.

Looking for verified, high-value luxury assets? Explore authenticated pre-owned luxury items, rare collectibles, and verified secondary-market offerings by connecting directly via Trusted Secondary-Market Partners (opens WhatsApp chat). Or you can connect on call +91 9503021689 (opens phone dailer)