Rolex · Rolex 4130

Rolex Daytona 116500LN and 116520 power reserve: inside the calibre 4130

The calibre 4130 powered every Rolex Cosmograph Daytona from 2000 to 2023, including the steel 116520 and the ceramic-bezel 116500LN. From full it runs for about 72 hours, or three days.

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

Watches that use the Rolex 4130

The 4130 was Rolex's first fully in-house chronograph movement, and for 23 years it was the only one in the Daytona. If your Daytona has a six-digit reference starting with 1165, it has a 4130. In 2023 Rolex replaced it with the closely related 4131 in the 1265xx generation.

The 4130 isn't used outside Rolex. Its architecture also underpins the 4161 regatta chronograph in the Yacht-Master II, and the current Daytona's 4131 is its direct successor.

Specs at a glance

History and where it came from

Rolex spent most of the 20th century buying chronograph movements. The early Daytonas, including the Paul Newman models, used hand-wound Valjoux calibres. When the Daytona became automatic in 1988, Rolex used the calibre 4030, a Zenith El Primero it slowed from 36,000 to 28,800 vph and heavily reworked.

In 2000 Rolex launched the 116520 with its own movement, the 4130. It was designed from scratch around a column wheel and a vertical clutch, and with far fewer parts than a typical chronograph. One analysis puts it at roughly 60% of the component count of a comparable modular chronograph. Rolex also rearranged the chronograph's minute and hour counters so a single mechanism drives them, which freed space for a bigger mainspring. The reserve went to 72 hours, far more than most automatic chronographs of its day.

The 4130 was also the first Rolex movement to use a Parachrom hairspring, made from a paramagnetic niobium-zirconium alloy. Later production switched to the blue Parachrom used across the range. The movement stayed in the Daytona through the 116500LN ceramic-bezel update in 2016 and was retired in 2023, when the 126500LN arrived with the 4131: the same architecture with Rolex's newer Chronergy escapement, fewer parts and a redesigned rotor.

Accuracy in the real world

Every 4130 was COSC-certified. From around 2015, Rolex also tested finished watches to its -2/+2 s/day Superlative Chronometer standard, so later 116520s and all 116500LNs were built to that figure. Owners of the 116500LN commonly report new watches running within a couple of seconds a day.

The vertical clutch matters here. On a traditional lateral-clutch chronograph, starting the chronograph loads the going train and can cost amplitude, and the seconds hand can stutter as the gears mesh. The 4130's clutch engages two friction discs face to face, so the chronograph can run continuously without a meaningful effect on timekeeping. Some owners leave it running as a sweeping seconds hand. Older 4130s with the first-generation Parachrom spring are also, like any Rolex, best kept away from strong magnets if they start running fast.

Reliability and servicing

The 4130 has a strong reputation. The low part count and simple layout were designed for reliability, and 23 years in production means its behaviour and service needs are well known.

• Brand service. Rolex service centres handle it routinely. Rolex recommends roughly ten years between services for watches sold since 2015; for older Daytonas, watchmakers usually suggest a shorter interval depending on how it's running.
• Independents. Chronograph servicing takes more skill, and Rolex restricts parts to its own network and certified accounts, so fewer independents take on a 4130 than a 3135.
• Signs it needs attention. A chronograph that doesn't reset cleanly to zero, a minute counter that jumps erratically, or a noticeably short reserve are all reasons to have it checked.

Quirks worth knowing

• No running centre seconds. The central hand is the chronograph seconds. The watch's own seconds are the small subdial at 6 o'clock, which is also where you see it's running.
• Screw-down pushers. Unscrew the pushers before using the chronograph and screw them back afterwards. Don't press them underwater.
• Screw-down crown. Unscrew it to wind. Pull it out once to set the time; that also stops the small seconds. There's no date to set.
• Wind it properly from stopped. A 72-hour mainspring holds a lot. A stopped Daytona needs a good hand wind, or a full day's wear, before it will last through a weekend.

How it compares

• Omega 3861: the Speedmaster Moonwatch's hand-wound chronograph. Lateral clutch, about 50 hours of reserve, Master Chronometer certified; no automatic winding.
• Zenith El Primero 400: the movement the old Daytona 4030 was based on. Faster 5 Hz beat and a date, but shorter reserve.
• Valjoux 7750: the industry-standard automatic chronograph. Cam-actuated, around 42 hours of reserve, with a noticeable jump when started.
• Rolex 3235: Rolex's current time-and-date movement, with a 70-hour reserve and the Chronergy escapement the 4131 later adopted.

Living with the 72-hour reserve

Seventy-two hours is exactly three days. Take a fully wound Daytona 116500LN off at 6pm on Friday and it will still be running at 6pm on Monday. That covers a normal weekend easily, and a three-day weekend just about, if it started full.

The Daytona is also a watch people tend to rotate rather than wear daily, which is where the reserve catches them. After a week in the safe it will have stopped, and while there's no date to reset, you'll still need to set the time. If the 116520 went into the weekend after a light desk day, it may not make it through a long weekend either. Watch Winder counts down this 72-hour reserve for each watch you own and reminds you before it stops. To check a particular weekend, try the "Will my watch stop?" calculator.

Verdict

The 4130 is one of the best automatic chronographs made. It has a column wheel and vertical clutch, a low part count, a 72-hour reserve and chronometer accuracy, in a package slim enough to keep the Daytona wearable. Its successor, the 4131, is a refinement rather than a fix. If you're buying a 116520 or 116500LN, the movement is a reason to buy, not a compromise. Service it through Rolex or a trusted chronograph specialist, and don't press the pushers underwater.

FAQ

How long does a Rolex Daytona 116500LN run off the wrist?

About 72 hours from full, or three days. The 116500LN uses the calibre 4130, as does the earlier steel 116520.

How accurate is the Rolex Daytona 116500LN?

The 116500LN is tested by Rolex after casing to -2/+2 seconds a day as a Superlative Chronometer. Owners generally report new watches within a couple of seconds a day.

Can you leave the Daytona chronograph running all the time?

Yes. The 4130's vertical clutch lets the chronograph run continuously without a meaningful effect on timekeeping, though it adds a little wear to the chronograph parts over time.

Does the Rolex Daytona hack?

Yes. Pulling the crown out to set the time stops the small seconds hand at 6 o'clock.

What's the difference between the Rolex 4130 and 4131?

The 4131, introduced in the 2023 Daytona 126500LN, keeps the 4130's architecture and 72-hour reserve but adds the Chronergy escapement, fewer parts and a redesigned rotor.

Will my Rolex Daytona stop over the weekend?

Not if it was fully wound. A full Daytona 116500LN or 116520 runs about 72 hours, enough for Friday evening to Monday evening, but one that started the weekend half-wound can stop sooner.

Does the Rolex Daytona 116520 have a Zenith movement?

No. The 116520 uses Rolex's in-house calibre 4130. The earlier 16520, made from 1988 to 2000, used the Zenith El Primero-based calibre 4030.

Sources

• Monochrome: Everything that changed on the steel Rolex Daytona 126500LN
• Wikipedia: Rolex Cosmograph Daytona
• TheWatchInfo: Rolex Daytona movements, from Valjoux and Zenith to the 4130

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 4130. 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 72 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 4130: 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.