Introduction
Rolex does not make many eccentric watches. The brand's entire identity is built on evolutionary precision — design decisions measured in millimetres across decades, cases that change so slowly you need reference photographs to notice. Against that backdrop, the Milgauss was always the outlier. A 40mm stainless steel sports watch with an orange lightning bolt for a seconds hand, a green-tinted sapphire crystal available on no other Rolex, and a function — resistance to magnetic fields up to 1,000 gauss — that most of its wearers would never need but everyone immediately understood.
Rolex discontinued the entire Milgauss collection at Watches & Wonders 2023 without replacement. No announcement, no successor reference, no acknowledgement beyond its absence from the new catalogue. Available only through the secondary market, its values have moved accordingly.
Quick Specifications
- Brand: Rolex
- Model: Milgauss
- Reference: 116400 (clear sapphire crystal); 116400GV (green sapphire crystal — "Glace Verte")
- Case Material: Oystersteel (904L)
- Case Size: 40mm diameter × 13mm thickness
- Bezel: Fixed, domed, smooth stainless steel
- Crystal: Clear sapphire with anti-reflective coating (116400); green-tinted sapphire — Glace Verte (116400GV). The green sapphire is unique to the Milgauss in the entire Rolex catalogue
- Bracelet: Oyster, three-piece solid links, Oysterlock folding clasp, 5mm Easylink comfort extension; fully polished
- Movement / Caliber: Rolex Calibre 3131, in-house manufacture
- Frequency: 4Hz (28,800 vph)
- Power Reserve: Approximately 48 hours
- Complications: Stop-seconds; antimagnetic protection to 1,000 gauss via soft-iron inner case (Faraday cage) combined with paramagnetic movement components
- Certification: Superlative Chronometer (±2 sec/day)
- Water Resistance: 100m / 330ft; Twinlock screw-down crown
- Production Period: 2007 to 2023 (discontinued)
- Current Status: Discontinued; available on the secondary market only
What Is the Milgauss 116400?
The reference 116400 is the modern generation of the Rolex Milgauss — the watch Rolex designed in the 1950s for scientists and engineers working in environments where electromagnetic fields disrupted the timekeeping of standard mechanical watches. The name combines the French "mille" (one thousand) with "gauss," the unit of magnetic field strength.
The modern 116400 achieves antimagnetic capability through two mechanisms: a soft-iron inner case (Faraday cage) that physically diverts magnetic energy away from the movement, and the Calibre 3131's use of paramagnetic materials including the Parachrom hairspring in niobium-zirconium alloy and amorphous nickel-phosphorus escape wheel and pallet fork. The result is confirmed resistance to 1,000 gauss.
History of the Model
The Milgauss lineage begins in 1956 with the reference 6541, developed in direct collaboration with CERN — the European Organisation for Nuclear Research. Early reference 6541 examples were awarded to winners of certain US motorsport events in the early 1960s. The reference 1019 succeeded in 1960 and ran until 1988. After nineteen years, Rolex revived the Milgauss in 2007 with the reference 116400, reintroducing the lightning bolt seconds hand and bold orange colour accents. The timing coincided with the completion of CERN's Large Hadron Collider. The 116400 ran for sixteen years before being discontinued at Watches & Wonders 2023.
Variations of the Model
116400 — Black dial, clear sapphire crystal (2007–2013/2014). The launch configuration. White applied baton hour markers with adjacent orange plots on the outer minute track. Discontinued ahead of the Z-Blue introduction.
116400 — White dial, clear sapphire crystal (2007–2016). White lacquered dial with orange applied baton markers and orange minute track numerals. Now among the rarer of the modern 116400 configurations on the secondary market.
116400GV — Black dial, green sapphire crystal (2007–2023). The defining modern Milgauss. Three orange applied baton markers at 3, 6 and 9 o'clock, orange numerals on the minute track. The green tinted crystal — Glace Verte — adds an emerald quality to the dial view. Produced continuously from launch until the 2023 discontinuation.
116400GV — Z-Blue dial, green sapphire crystal (2014–2023). Introduced in 2014. The Z-Blue dial — zirconium-treated — is an electric blue that shifts between indoor and outdoor light. Combined with the green sapphire crystal, the result is one of the most visually distinctive combinations in any modern Rolex reference. Currently commands the highest secondary market premium of the modern variants.
Market and Price Context
The Milgauss 116400 was one of the few modern steel Rolex sports references that did not trade at a significant premium to retail during its production years. Since the 2023 discontinuation, publicly available listing data suggests secondary market prices have risen materially above their final retail prices. The Z-Blue 116400GV examples command the highest premiums of the modern variants, with the standard black GV close behind.
Buying Advice
Full set matters more than usual. Box, papers — confirm production date, reference, and authenticity. Dial authenticity. The orange detailing is susceptible to fading or damage from improper cleaning. Inspect for even colour and consistent finish across the orange elements. Crystal condition — GV references. The green sapphire crystal is not replaceable by non-Rolex service centres. Ask explicitly about crystal condition. Case condition. The fully polished case and bracelet shows wear readily. An unpolished example with original factory mirror finish commands a premium. Source from accountable dealers.
Final Thoughts
The Rolex Milgauss 116400 was the most characterful watch in the modern Rolex professional range — the one that permitted itself a sense of humour without abandoning any of the engineering seriousness the brand stands for. For the right buyer, the window to buy a full-set 116400GV at a reasonable secondary market price is probably now rather than later. Wind It Up Watches can help source a verified example through our trusted network.
