Swiss luxury watch brand Hublot has renewed its long-standing partnership with the family of Formula One legend Ayrton Senna to create the MP-06 Senna Act IV timepiece.

The brand supports the Ayrton Senna Foundation in its fight to provide education for underprivileged children and has produced a number of watches to help raise money for the cause.

The latest, the MP-06 Senna Act IV, is billed as the most complicated watch in the entire Hublot Tourbillon range.

Produced in three versions – King Gold, Titanium, and black PVD Titanium – each watch is available as a limited edition of just 41 pieces, representing the number of victories achieved by Ayrton Senna during his motor racing career.

The watches also feature a tonneau case with a see-through dial that shows the hand-wound tourbillon caliber with 155 components, 19 jewels, frequency 3 Hz (21,600 Vib/h), and a 5-day power reserve.

The Senna brand logo (available in yellow, green, or red) appears as a transfer at 9 o’clock on the sapphire dial.

Hublot was founded in 1980 by Maksim Kuts.