RICHARD MILLE RM UP-01: The Thinnest Mechanical Watch

Adding a new dimension to the enduring ultra-thin challenge between major haute horlogerie brands, Richard Mille has just created a new world record in the category of thinnest mechanical watch with its new RM UP-01 Ferrari.

With a thickness of just 1.75 mm, the Richard Mille RM UP-01 has surpassed the thinness record established by Bulgari Octo Finissimo Ultra (1.80mm) early this year. Combining most modern designs with performance, aesthetics and ruggedness, the new ultra-thin watch was developed in collaboration with prestigious Italian automotive brand Ferrari.

The RM UP-01 Ferrari is a culmination of many years of work and more than 6,000 hours of development and laboratory testing. Equipped with a robust manual-winding mechanical movement, this extremely thin watch can withstand accelerations of more than 5,000g’s.


The Richard Mille RM UP-01 Ferrari has a monobloc case made of grade 5 titanium. Its case-back and bezel are satin-finished, with polished bevels. Secured with 13 grade 5 titanium spline screws and abrasion-proof washers in 316L stainless steel, the ultra-thin case offers a water resistance of 10 meters.

The watch features an out of the ordinary face (bezel) design. It displays the hour and minute on a sub-dial positioned at the upper portion. This small dial is topped with a sapphire crystal glass. On the top right side of the watch face is the sub-dial for the balance, protected with a sapphire crystal glass.

On the top left side, you will find an integrated function selector with two positions: W (winding) & H (hand-setting). The turning crown positioned between 7 and 8 o’clock offer two functions: manual-winding of the movement and time-setting. Both crowns are protected with black ceramic inserts, to ensure water resistance and eliminate friction.


This timepiece incorporates a patented ultra-flat escapement jointly developed by Audemars Piguet and Richard Mille. This new type of escapement with a balance wheel in titanium significantly reduces the calibre’s thickness whilst providing the same security as a conventional Swiss anchor escapement. The new patented, ultra-flat escapement eliminates parts like the guard pin and the safety roller to maintain the thinness of the movement.

Displaying hours, minutes and function selector, the hand-wound mechanical movement has a power reserve of 45 hours.

Its base-plate and bridges are made of grade 5 Titanium, a biocompatible, highly corrosion-resistant and robust alloy. The skeletonised baseplate was subjected to separate and extensive validation tests to ensure it met rigorous optimal strength requirements.


For this watch, Richard Mille has developed an ultra-thin interpretation of its emblematic tonneau shape. The grade 5 Titanium case is just 1.75mm thick and the movement beating inside has a thickness of 1.18 mm.

The 23 jewel manual-wound ultra-flat movement measures 41.45mm length and 28.85 mm width. It balance frequency is 28’800 vph (4 Hz).

All the titanium case components of this ultra-thin timekeeper are machined at the Richard Mille movement department to meet the extremely demanding machining tolerance of a single micron. The Ferrari prancing horse symbol and all the references present on the case are laser-engraved.

The Richard Mille RM UP-01 watch is available in a limited edition of 150 pieces. It weighs just 30 grams including strap.