Rolex discontinued the Milgauss in 2023, and the market noticed immediately. It was always the odd one out — built for CERN physicists, decorated with a lightning bolt, and fitted with a green sapphire crystal that Rolex has never used on anything else. We hold 6 of them from £8,150.
What it was built for
Launched in 1956, the Milgauss was designed to survive magnetic fields of 1,000 gauss — hence the name, from the French mille. Rolex developed it for scientists and engineers working around powerful electromagnets, and CERN tested it.
The engineering is a soft-iron Faraday cage: an inner case of ferromagnetic alloy that shunts magnetic flux around the movement rather than through it.
Why magnetism matters
A magnetised hairspring sticks to itself, shortening its effective length and making a watch run wildly fast — minutes a day, not seconds. It is the single most common cause of a mechanical watch suddenly keeping terrible time, and modern life is full of magnets: laptop lids, phone cases, speakers, induction hobs.
The fix for an ordinary watch is a demagnetiser, which takes seconds. The Milgauss simply does not get magnetised in the first place.
The references
The 6541 (1956) had a rotating bezel and the original lightning-bolt hand. The 1019 (1960–1988) was the sober, straight-handed version that sold poorly and is now the collector's pick.
The model then vanished for nineteen years. It returned in 2007 as the 116400, 40mm, with the lightning bolt restored, and in 2007 the 116400GV ("Glace Verte") added the green-tinted sapphire crystal and the "Z-Blue" electric blue dial followed in 2014.
The green crystal
Rolex will not say how it is made and has never used it on another model. It is not a coating — the tint runs through the sapphire — and Rolex has stated it cannot be reproduced by any other manufacturer.
In practice it puts a subtle green cast around the edge of the dial that changes with the light. It is the single most distinctive thing about the watch.
Buying one
Our Milgausses run £8,150 to £8,800. Check the crystal carefully — a replaced non-GV crystal on a GV reference is a significant loss of value and not always disclosed.
Check the lightning-bolt hand is straight and the orange or green lume is intact. And confirm the reference matches the dial: 116400 (white or black dial), 116400GV (green crystal), 116400GV Z-Blue.
Why it is worth considering now
It is discontinued, it was never a volume model, and it is the only Rolex with a genuinely eccentric design. That combination has historically been kind to values.
It is also, at £8,150, one of the cheaper 40mm modern steel Rolexes you can buy.
Browse the collection
See our pre-owned Rolex Milgauss stock — 6 watches from £8,150.
Frequently Asked Questions
Rolex has not said. It has revived the name once before, after a nineteen-year gap.
Almost certainly not. Buy it because you like it.
No more than any sapphire crystal. But replacements are Rolex-only and expensive.
