Patek Philippe has created a unique name for the watches from the brand. With the 5204, they have come up with another amazing luxury watch. This stylish perpetual calendar with split-seconds chronograph from Patek is replacing their model 5004 with various noteworthy additions. We checked out a watch at Basel 2012 and got to the bottom of the model’s scintillating features.

We noticed a few changes and will explain them one by one. Patek has increased the case size from 36.7 to 40 millimeters, and is following the current industry trend towards bigger watches. The end product looks pretty stunning and is in line with the market standards.

For the time being, the 5204p-001, which is commonly referred to as 5204, is available in platinum only. 5204p upgraded itself to gold baton markers with luminescent fills from the Arabic numerals synonymous with its predecessor, the 5004p. Opalescent 18k white gold is used for creating the dial and black oxidized gold with Super Luminova inlays are used for creating hands. The stress given for sub registers is reduced a bit by moving leap year and day/night indicators to smaller windows.

The new dial features has day and month windows at the 12 o’clock position, 30-minute chronograph register at 3’clock position, leap year window is located between 4 and 5 o’clock position, date register and moon phase are at 6’oclock position, day/night window is located between 7 and 8 o’clock position, running seconds register is at 9 o’clock position and the hours/minutes hands and two split seconds hands are located exactly on the dial. Overall, the 5204 looks classier than 5004 and is not hard on your eyes for all the amazing features that are intricately woven in to the design.

When it comes to the true power of the 5204, it is the caliber CHR 29-535 PS Q movement, with a Gyromax balance beating at 28,800 bph (4Hz) that driving the watch. This is way better than the 18,000 bph of the 5004’s CHR 27-70 Q. Besides this, the 29-535 PS Q used in the 5204 is a completely in house crafted chronograph created by Patek Philippe. The 27-70 Q chronograph used a modified version of the Lemania system. The 5204p has a manually wound system that can last for a whopping 65 hours. The transparent sapphire case back let you see the inside. This eighth in house chronograph creation from Patek is available in solid platinum model too.