The annual calendar chronograph is one of the most fascinating yet rarest combinations in the industry, and one brand in particular does it better than others. This is Patek Philippe who invented the annual calendar function in 1996 Today, there is a rather large collection of watches using this unusual combination, and in particular the reference 5905 she is often considered the most attractive model. Patek launches a surprisingly sporty new version of this watch with steel case, steel bracelet and olive green dial: the new Annual Calendar Chronograph 5905 / 1A, a modern watch, with a diameter of 42 mm, which combines two of Patek's best complications, the annual calendar function and the chronograph.

Previously available in rose gold with a chocolate dial or in platinum with a blue or black dial, the 5905 is renewed this year in a rather striking combination. And if the specifications and proportions are identical, the case has been assigned a more common material, stainless steel, which is somewhat of the exception for Patek Philippe, although recently we have seen more and more models made in this material. . Entirely polished, with a rounded bezel and rectangular pushers, it is a rather large watch in weight and presence. Modern and stylish, it is now combined with something completely new to this range, a 3-link stainless steel bracelet with folding clasp. This combination results in a drastically different look from previous editions in precious metals.

As for the dial, the display remains identical. Central hours and minutes, without continuous seconds, a sub-dial at 6 o'clock that acts as a practical 60-minute counter for the chronograph, central chronograph seconds. And of course there are the 3 windows at the top for the annual calendar function, positioned in a very European way, with the indication of the day of the week, the date and the month. Finally, a small round opening in the sub-meter is used as a day-night indicator.

New for this model, but not for Patek, the new 5905 / 1A Annual Calendar Chronograph features an attractive sun-brushed olive green dial. All the elements of the dial are in white gold (hands and indexes applied) or white for the numbers and indexes, making it quite elegant and sporty.

Powering this watch is the in-house caliber itself CH 28-520 QA 24H, a modern automatic chronograph with an annual calendar module on top. It is based on an integrated construction and the chronograph functions are operated by a column wheel and a vertical clutch. It also has a flyback function. With its Patek Philippe Seal certification, the decoration is superb and, although a central rotor partially hides it, the view through the caseback is pleasant. The frequency is 4Hz and the power reserve is given for 45-55 hours.

Il Patek Philippe Chronograph Annual Calendar 5905 / 1A in stainless steel and olive green dial will be part of the permanent collection and will be priced at 51.500 EURO.