Rolex · Rolex 3230

Rolex Submariner No Date, Explorer and Oyster Perpetual power reserve: inside the calibre 3230

The calibre 3230 powers the Rolex Submariner No Date, Explorer, Oyster Perpetual and Air-King. From full it runs for about 70 hours, just under three days.

Updated September 2026 · Based on manufacturer specs, published reviews and watchmaker/owner reports

Watches that use the Rolex 3230

The 3230 is Rolex's time-only automatic: hours, minutes and central seconds, no date. It arrived in 2020 with the 41 mm Submariner No Date and the new Oyster Perpetual line, and has since spread to the Explorer and Air-King. If a current, full-size Rolex has three hands and a plain dial with no date window, the 3230 is almost certainly the engine.

Rolex doesn't supply the 3230 to anyone else. Its siblings are the 3235 (the same movement with a date), the 3285 (GMT) and the 3255 (day and date).

Specs at a glance

History and where it came from

For roughly two decades Rolex's no-date watches ran on the 3130 family: the 3130 in the Submariner 14060 and 114060 and the Air-King, and the 3132 in the Explorer and Oyster Perpetual 39. Those were solid movements with about 48 hours of reserve.

When Rolex launched the redesigned 41 mm Submariner range in September 2020, it moved the date and no-date models onto new calibres at the same time. The dated Submariner got the 3235, and the no-date 124060 got the 3230, which is essentially the same movement with the date works left out. The new Oyster Perpetual 41, 36 and 34 launched with it the same month. The 36 mm Explorer followed in 2021 and the Air-King in 2022.

The architecture is the one Rolex introduced in 2015 with the 3255 and 3235. The Chronergy escapement uses an openworked escape wheel and redesigned pallets that Rolex says are about 15% more efficient, and the barrel has a thinner wall to hold a longer mainspring. Together they take the reserve from 48 to 70 hours without making the movement any bigger.

Accuracy in the real world

Every 3230 watch passes COSC as a bare movement, then Rolex tests the finished watch to -2/+2 seconds a day. That cased test is the more useful number, because it's what the watch actually does with its hands, dial and rotor fitted. New Explorers, Oyster Perpetuals and Submariner No Dates are usually reported by owners to run within that window, typically a little fast.

The 3230 shares the 32-series history of the 3235. Some watches from the first few years of production have been reported to start running slow after two or three years, with lower amplitude and a shorter reserve, and the usual explanation from watchmakers is lubrication. Rolex has made no public statement, but affected watches have reportedly been corrected under the five-year guarantee. If your Oyster Perpetual starts losing several seconds a day while it's still under warranty, send it back rather than regulating around it.

Magnetism is less of a worry than with a traditional steel hairspring. The blue Parachrom spring and the nickel-phosphorus escape wheel and pallet fork are paramagnetic, so everyday exposure is unlikely to throw the rate off.

Reliability and servicing

Rolex recommends a service roughly every ten years for watches sold since 2015 and gives a five-year guarantee. The 3230 has only been around since 2020, so there are few examples yet that have reached a first scheduled service.

• Brand service. Rolex and its authorised service centres have full parts access, and replace the barrel and mainspring as a unit when needed.
• Independents. The same concerns watchmakers raise about the 3235 apply here: a thin-walled barrel that isn't meant to be opened, a sealed ball-bearing rotor assembly, and parts restricted to Rolex's own network. A capable independent can still do a lot, but less than on a 3130.
• Fewer parts to go wrong. Without a date mechanism, the 3230 has less to set, jam or damage than the dated 3235.

Quirks worth knowing

• Only two crown positions. Screwed down, then unscrewed for winding, then pulled out once to set the time. With no date, there's no quickset position to overshoot.
• Unscrew first. Every watch in the table has a screw-down crown. Wind it with the crown unscrewed and screw it down firmly afterwards, especially on the Submariner.
• No date means no danger zone. You can set the time at any hour without worrying about the date wheel. That's one less thing to think about when a watch has stopped in the drawer.
• Fill it properly. A 70-hour mainspring takes longer to fill than a 48-hour one. A stopped watch needs a good hand wind before it will last through a weekend off the wrist.

How it compares

• Rolex 3235: the same movement with a date, used in the Submariner Date and Datejust. Identical reserve and accuracy standard.
• Rolex 3135: the older dated sibling of the 3130. Around 48 hours of reserve, and generally easier for independents to repair.
• Tudor MT5402: the Black Bay 58's no-date movement, also 70 hours with a silicon hairspring. COSC-certified, but without Rolex's tighter cased test.
• Omega 8800: the Seamaster Diver 300M and Aqua Terra 38. Co-axial, 0/+5 s/day under METAS testing and very magnetism-resistant, but 55 hours of reserve.

Living with the 70-hour reserve

Seventy hours is just under three days. Take a fully wound Explorer off at 6pm on Friday and it should still be running around 4pm on Monday. That comfortably covers a weekend when you switch to something else, which the 48-hour 3130 in an older Submariner 114060 couldn't promise.

"Fully wound" is doing a lot of work there. An Oyster Perpetual that spent Friday at a desk may start the weekend well short of 70 hours and stop on Sunday night. A long weekend or a week in the drawer will stop any 3230. Watch Winder counts down this 70-hour reserve for each watch you own and reminds you before it stops, so the Submariner is still running when you pick it up again. To check a specific weekend, try the "Will my watch stop?" calculator.

Verdict

The 3230 is the simplest movement in Rolex's modern range, and that's a compliment. It has a 70-hour reserve, a magnetism-resistant escapement, a -2/+2 s/day cased standard and no date to fuss over. In an Explorer, Oyster Perpetual or Submariner No Date, it gives you a watch that survives a normal weekend off the wrist and keeps close time. The caveats are the same as for the 3235: early 32-series examples have had some slow-running reports, and independents have fewer repair options than with the 3130. Keep the warranty card and use it if the rate drifts.

FAQ

How long does a Rolex Submariner No Date run off the wrist?

The current 41 mm Submariner No Date (124060) uses the calibre 3230 and runs for about 70 hours from full. The older 114060 with the 3130 ran for about 48 hours.

What is the power reserve of the Rolex Explorer?

The Explorer 124270 (36 mm) and Explorer 40 (224270) both use the calibre 3230 with a 70-hour power reserve, just under three days from full.

How accurate is the Rolex Oyster Perpetual?

The Oyster Perpetual 41, 36 and 34 are tested by Rolex after casing to -2/+2 seconds a day. Most owners report new watches running inside that range.

Does the Rolex Air-King hack?

Yes. The Air-King 126900 uses the calibre 3230, and pulling the crown out to set the time stops the seconds hand.

Will my Oyster Perpetual stop over the weekend?

Not if it was fully wound. From full it runs for about 70 hours, enough for Friday evening to Monday afternoon, but a watch that started the weekend half-wound can stop on Sunday.

Is the Rolex 3230 the same as the 3235?

Essentially yes, minus the date. Both have the Chronergy escapement, 31 jewels, 4 Hz, 70 hours of reserve and the same -2/+2 s/day standard.

Sources

• Monochrome: Introducing the 2020 Rolex Oyster Perpetual 41 ref. 124300
• Monochrome: The new Rolex Oyster Perpetual 41 ref. 134300
• aBlogtoWatch: Hands-on with the Rolex Air-King 126900
• Quill & Pad: A watchmaker's comparison of Rolex calibres 3135 and 3235

Keeping it running

• On an average day an automatic gains roughly 4 hours of reserve per hour on the wrist, so about 18 hours of wear fills the Rolex 3230. Desk days charge more slowly.
• Most automatics can also be wound by the crown. If yours has stopped, a few dozen turns gets it going before you put it on.
• Off the wrist it stops about 70 hours after it was last full. Stopped sooner?
• On a watch winder, start at about 650 turns per day, both directions. Winder settings for every movement.
• If it does stop, don't set the date between 9pm and 3am. Check if it's safe.

All Rolex movements · Other 70-hour movements

Never let it stop

Watch Winder counts down the reserve of every watch you own and reminds you before one stops. It already knows the Rolex 3230: type your watch's name and the reserve fills itself in.

Manufacturer's published figure. Real reserve varies with the watch's age and service; check your manual.