Patek Philippe 5270P Perpetual Calendar Chronograph iN Green
Patek Philippe has created several generations of perpetual calendar chronographs, but continues to fine-tune and innovate. Back in 2011 was the initial launch of reference 5270 and since then it now reappears as its iconic self, while adding a partial new layout. After all the blues and silver tones, we get a lively lacquered green dial.The 41mm case is made of 950 platinum which is one of the hardest precious metals to work with, hence its added value. Crafting those elegant two-tier lugs is a work of art and meticulous calculation. Plus mounted to the case is a concave bezel with a polished finish.
On the flip-side is an interchangeable full back or sapphire exhibition caseback that allows a view into the inner workings of the mechanical movement. This caliber has 6 patents and as the official press-release says: “Caliber CH 29-535 PS Q is distinguished by its traditional architecture, combined with six patented innovations relating to the chronograph, as well as by its exceptionally thin calendar mechanism.”
It comes equipped with two rectangular push-pieces to operate the chronograph functions, while in between is a knurled screw-in setting crown embossed with the Calatrava cross.
Plus very discreet pushers that allow adjusting the perpetual calendar features. Water-resistance can reach up to 30 meters (98 feet).
Time is exhibited on a lacquered green dial with 18k white gold applied hour index markers, followed by white printed tracks with minute and precision seconds. By doing so Patek opted to exclude the more commonly used tachymeter scale. Its center hue goes from the initial green to a black-gradient effect that darkens substantially by the rim portion of the dial.
The perpetual calendar display is laid out in a very effective and fluid way. On the upper-half of the dial are two gold framed windows with the day of the week and month. 
It features a tri-compax layout with three sub-dials: a 30-minute counter at 3 o’clock, a perpetual calendar with date at 6 o’clock, and sub-seconds at the 9 o’clock position. 
In the midst of the perpetual calendar we can also admire a detailed moon-phase, while to its side are two round apertures for the day/night indication and the leap-year cycle.
Patek Philippe 5270P Perpetual Calendar Chronograph Green
The “Patek Philippe 5270P Perpetual Calendar Chronograph Green Dial” (Ref#: 5270P-014) is powered by the in-house hand-wound mechanical movement, caliber CH 29-535 PS Q with 33 jewels, 456 components, and 28,800 vph. It comes equipped with a Gyromax balance, column wheel, and horizontal clutch. Power reserve can last up to 65 hours, when fully wound.
Mounted on the watch is a hand-stitched black alligator scaled leather strap with exposed green stitching, secured to the wrist by a 950 platinum fold-over clasp. 
For more up to date information visit the official Patek Philippe website here.
