Richard Mille presents a new version of the RM 65-01 split-seconds chronograph this summer.

Not only has a Grey Quartz TPT edition of the automatic split-seconds chronograph been launched, the edition is no longer limited. The company is ready to take on any workload, just like the watch itself.

The model which debuted as a black Carbon TPT edition in December 2020 was later launched in red-gold and titanium. From 2023, there will be four versions of the chronograph. For this year's novelty, gray Quartz TPT has been used to make the bezel, caseband, and caseback.

Titanium has been used for the winding crown and chronograph pushers. As a nod of respect to the engineers, the designers have highlighted the pusher at 8 o'clock. A lemon-yellow shade has been used for this pusher, which controls the rapid-winding system.

The patented rapid-winding mechanism allows the barrel to be fully wound in 125 pushes. The company invited Vaucher Manufacture Fleurier to work on the movement housed in the RM 65-01, who've collaborated with Richard Mille since 2002.

The fruit of their first collaboration was the automatic RM005-01 movement. Now they've created the RMAC4 — a high-frequency (36,000 vph) split-seconds chronograph caliber which can measure time accurately to 1/10th of a second.

The movement features characteristics that are typical of Richard Mille's calibers: a function selector and rotor with variable geometry. Another of this complicated model's highlights aims to make the watch easier to use — color-coded functions.

Light blue is used to highlight the traditional timekeeping elements, deep blue is used for the date, orange is reserved for the chronograph (the only exception being the purple hand for the split-seconds function), and yellow is used for the winding mechanism.

These bright accents stand out against the gray backdrop of the movement's openworked details. Its monochrome palette is created by the gray electroplasma treatment on the baseplate and black PVD coating for the bridges. The baseplate and bridges are made of titanium.

The RMAC4 movement accumulates enough energy to keep the watch going for 60 hours thanks to its fast-rotating barrel, which completes one full revolution every 6 hours instead of every 7.5 hours.