Rolex Caliber 7140

Rolex Caliber 7140

Rolex Caliber 7140

Manufacturer Rolex
Caliber Number 7140
Movement Type Automatic, self-winding mechanical
In-House? Yes
Yes (COSC + Superlative Rolex certification)
Jewels 38
Power Reserve ~66 hours
Beat Rate
28,800 vph (4Hz)
Lift Angle
-2/+2 seconds per day
Rotor Type
Rotor Winding Direction
Hand-Winding Direction
Anti-Shock System Paraflex
Hairspring Syloxi (silicon)
Hands Count
Features Central hours; central minutes; small running seconds subdial at 6:00
Hacking Seconds?
18K yellow gold rotor with cutout design, Rolex Côtes de Genève decoration (“Geneva stripes” with polished groove between each band)
Country of Manufacture Switzerland, Swiss made
Known Models Rolex 1908 (Ref: 52508 Intense White; Ref: 52509 Intense Black)

The Rolex caliber 7140 is a true no-date, 3-handed automatic luxury watch movement with a small running seconds. As with all current production Rolex watches, the 7140 is an in-house movement as Rolex puts it in their user manual, it is “a self-winding mechanical movement entirely manufactured by Rolex.”

When was it introduced?

This brand new caliber was announced on the first day of Watches and Wonders 2023 (March 27, 2023) with the release of the 1908 model. This is one of the few Rolex watches ever produced with an exhibition style caseback.

Rolex Caliber 7140 1908 Exhibition Crystal

In Rolex’s Own Words:

“To drive the 1908, Rolex watch engineers developed calibre 7140, a completely new self-winding movement, with two centre hands and a small seconds at 6 o’clock. Five patent applications have been filed for this slim movement, entirely developed and manufactured by Rolex.

Fitted with the Syloxi hairspring, Chronergy escapement and Paraflex shock absorbers, it guarantees a power reserve of approximately 66 hours and offers outstanding chronometric performance (–2/+2 seconds per day).” –Source

And also this:

The 1908 is equipped with calibre 7140, a movement wholly developed and manufactured by Rolex, unveiled in 2023. A distillation of technology, this self-winding mechanical movement delivers outstanding performance in terms of precision, power reserve, convenience and reliability. Calibre 7140 demonstrates carefully finished aesthetics, notably on the bridges, which feature Rolex Côtes de Genève – a decoration that differs from traditional Côtes de Genève for the slight polished groove between each band. Calibre 7140 incorporates the patented Chronergy escapement, which combines high energy efficiency with great dependability. Made of nickel- phosphorus, this escapement is resistant to strong magnetic fields. The movement also includes the patented Syloxi hairspring and its power reserve extends to approximately 66 hours.” -Source: video description

Rolex Caliber 7140 1908 Watch


Rolex claims the caliber 7140 is more precise than an officially certified chronometer with an accuracy of -2/+2 seconds per day “after casing”. To jump start your watch after the movement has stopped, Rolex recommends manual-winding clockwise for 25 turns of the crown.

Power Reserve:

Once the watch is fully wound, it should run for approximately 66 hours. You will get the best rate of precision when measuring accuracy on a full power reserve.

Setting the Time:

To set the time on your cal. 7140 powered timepiece, pull the crown out one click. Because this is a true no-date movement, there is only one crown setting position. The seconds will be stopped when the crown is pulled out (hacked seconds). Rolex states that it is ok to move the hands forwards or backwards to reach the desired time.

Caliber Corner still needs to add this caliber to the Rolex Time Setting Crown Direction list. If you have handled the 1908 and know the crown turning direction for advancing the hands forward, please add the information to the comments below.

Movement/Rotor Text:


Exploded Views:

Rolex Caliber 7140 Exploded View Red Reverser Wheels

Rolex Caliber 7140 1908 Macro 1

Rolex Caliber 7140 Exploded View Syloxi Hairspring


Watches with this movement:

As of this post (3/27/23) the calibre 7140 is only found in two Rolex watches: The model 1908 with an “Intense White” aka silver or “Intense Black” dial, available in 18K yellow gold (ref: 52508) or 18K white gold (ref: 52509). This diameter is 39mm. Sapphire crystal. 50m water resistance. Alligator leather strap with solid gold double folding Dualclasp. The retail price is $22,000 USD.

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