The Rolex Milgauss is a discontinued 40 mm anti-magnetic tool watch with a lightning-bolt seconds hand and no date, while the Datejust is Rolex's current classic dress-sport watch with a date window, offered in 36 mm and 41 mm. Choose the Milgauss if you want a distinctive, out-of-production Rolex with a technical story. Choose the Datejust if you want the safer everyday watch that Rolex still makes and that suits the widest range of wrists and dress codes. Bizak & Co. is a sourcing desk, so every watch below is found on request rather than held in stock.
Last reviewed on October 28, 2026 by Filip Biczak. Figures on linked listings are dated observations, not quotes. Sources: Rolex, Datejust collection and Rolex, watch care and service.
What is the main difference between the Rolex Milgauss and the Datejust?
The Milgauss is built to resist magnetic fields, and the Datejust is built to be an all-round watch with a date. The Milgauss carries a soft-iron shield around its movement and was designed for people working near electrical equipment, which is why it has a smooth bezel, a tool-watch look and no date window. The Datejust is the long-running core of the Rolex range, defined by the Cyclops lens over the date and by a huge choice of dials, bezels and bracelets. Both use the Oyster case, so both are robust and water resistant.
Rolex Milgauss vs Datejust: specifications side by side
The table compares the Milgauss 116400GV with the current Datejust 36 and Datejust 41 on manufacturer-stated facts.
| Attribute | Milgauss 116400GV | Datejust 36 | Datejust 41 |
|---|---|---|---|
| Case size | 40 mm | 36 mm | 41 mm |
| Case material | Oystersteel | Oystersteel, with gold and white gold variants | Oystersteel, with gold and white gold variants |
| Movement | Calibre 3131, automatic | Calibre 3235, automatic | Calibre 3235, automatic |
| Power reserve | About 48 hours | About 70 hours | About 70 hours |
| Date window | No | Yes, with Cyclops lens | Yes, with Cyclops lens |
| Water resistance | 100 m | 100 m | 100 m |
| Magnetic protection | Resists fields up to 1,000 gauss | Standard Parachrom hairspring | Standard Parachrom hairspring |
| Distinctive features | Orange lightning-bolt seconds hand, green-tinted sapphire crystal (the GV in the reference), black or Z-Blue dial | Smooth, fluted or gem-set bezels | Smooth or fluted bezels |
| Production status | Discontinued in 2023 | In production | In production |
Is the Milgauss better than the Datejust for magnetism?
Yes, by design: the Milgauss resists fields up to 1,000 gauss, which no Datejust claims. The inner shield of soft iron diverts the field around the movement, so the watch keeps its rate near equipment that would disturb an ordinary mechanical watch. Everyday magnets from phones, laptop lids and speakers are far weaker than that, and the Datejust's modern hairspring copes with them well, so most owners will never use the Milgauss's full protection. For a normal desk job, the benefit is more a talking point than a necessity. The Rolex Milgauss guide explains the shield in more depth.
Which is bigger, the Milgauss or the Datejust?
The Milgauss sits between the two Datejust sizes in diameter: it is 40 mm, against 36 mm and 41 mm. On the wrist it wears larger than that number suggests, because the shield makes the case about 13 mm thick, so it sits taller than a Datejust of similar diameter. The Datejust 36 is the smaller classic fit, and the Datejust 41 is the larger, more modern one. If you are undecided between the two Datejust sizes, our Datejust 36 vs 41 comparison walks through the fit.
Which looks better with a suit, the Milgauss or the Datejust?
The Datejust is the stronger dress watch, and the Milgauss is the stronger casual-technical watch. A Datejust with a smooth or fluted bezel and a Jubilee or Oyster bracelet sits comfortably under a cuff. The Milgauss, with its bright seconds hand and often colorful dial, reads as playful and distinctive, and it works with both a shirt-and-chinos outfit and a more formal one. The Milgauss has no date, which some buyers prefer for a cleaner dial.
Why was the Milgauss discontinued, and does it matter for collectors?
Rolex removed the Milgauss from its catalogue in 2023 without giving a reason or naming a successor, and it is now bought only on the secondary market. For collectors, a discontinued model with a clear identity, such as the green-crystal Rolex Milgauss 116400GV, tends to attract a dedicated following, and there will be no new supply from Rolex. The Datejust has the opposite profile: it is in constant production, so supply is deep and there are many examples to compare. Neither choice guarantees a gain, and you should buy the watch you want to wear. The 116400GV listings show dated examples.
Which is the better first Rolex, the Milgauss or the Datejust?
For most first-time buyers the Datejust is the easier choice, and the Milgauss is the more characterful second or niche choice. The Datejust offers new and pre-owned examples across a large range of configurations, which makes it simple to find and simple to resell. The Milgauss offers a rarer look, but fewer examples exist and they all come from the secondary market. You can browse the Rolex Milgauss collection, the Rolex Datejust collection and the Datejust 41 listings for from-prices on current examples, or see the wider Rolex range.
Quick answers
Does the Milgauss have a date? No. The dial has no date window, which is part of the clean tool-watch look.
Is the Datejust anti-magnetic? It has some resistance through its modern hairspring, but it makes no 1,000 gauss claim like the Milgauss.
Can I still buy a new Milgauss? Not from Rolex. It was discontinued in 2023, so remaining watches are pre-owned or unworn stock on the secondary market.
Get your Rolex sourced
Tell us the model, size, dial and bracelet preference, whether you want new or pre-owned, and your budget and timing, through our sourcing enquiry form. We confirm the specific watch, photographs and final price before you commit. A $200 deposit is credited to the price.
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