For 2014 and the brands 175th anniversary, Patek Philippe has released one of the?their?most complicated wristwatches of all time. This is no doubt inspired by the companys iconic Henry Graves Supercomplication pocket watch that was originally delivered in the 1930s and that will be re-auctioned in November 2014. The flagship timepiece?that marks the brands 175th anniversary is called the Patek Philippe Grandmaster Chime 5175 (ref. 5175R-001)? and it is an extremely complicated watch with two dials and 20 complications-the result of eight years of development according to Patek Philippe.Extremely complicated is?a term we are used to hearing?when it comes to Patek Philippe-for all the other most?notable pieces?check out our article on the 17 rarest and most expensive?Patek Philippe watches here. The Patek Philippe Grandmaster Chime however comes in at the very top of the food chain, with its massive?47.4 millimeter wide and 16.1 mm thick case and incredibly intricate?movement comprising 1,366 components-including three gongs and three hammers and altogether 20 complications displayed over?two dials. The case is also reversible, meaning it flips around. The movement also has a unique 3.5 Hz (25,200 bph) frequency. Beyond?stunning figures, the?Patek Philippe Grandmaster Chime features a very new, and we should say unexpected, novelty from Patek: a swiveling case. Much like some of the most highly complicated pocket watches of the manufacture, the GMC can only manage?to display all related information of its numerous complications on not one, but two dials. The heavily engraved 18k rose gold case-which is composed of?214 parts in itself-is suspended between similarly?lavishly?decorated lugs, and the case can be rotated on the longitudinal axis,?allowing the owner to be able to wear the watch with either of the two dials facing up-without having to?swap the straps, as seen on some other two-faced watches. The idea is to allow the wearer to have either side of the case be the front.The primary dial of the Grandmaster Chime 5175 displays the hours and minutes on centrally mounted hands-as per normal-however it also hides a number of indications with retrograde?hands and small circular apertures. To begin with, the large subdial at the 12 oclock position is for setting the alarm-with a little bell-shaped aperture indicating whether this function is armed or turned off. Beyond the large subdial at the 6 oclock position reserved?for the phase of the moon and date indications, this side also?displays the power reserve for the movement at 9, and that of the sonnerie complication at the 3 oclock positions.On two smaller displays surrounding the dates subdial, the settings for the chiming mechanisms can be?tracked: to the left is the display for the Silent, Grande, or Petite settings of the sonnerie, while to the right, the crowns momentary functionality can be seen: R stands for winding, A for setting the alarm, and H for setting the time. Last but not least, the two tiny apertures scattered at around the two and three oclock positions serve for the day-night indicator of a second time zone and the chiming mechanism isolator display (used to?indicate when it is safe to wind the movement without damaging the intricate chiming mechanism). One again Patek Philippe is to be credited in displaying all the indicators on the 5175 watch in a logical and relatively easy to read manner. Speaking of which, lets discuss the namesake complication of this timepiece: the chime. It is no secret that Patek Philippe is very proud of its chiming watches-Thierry Stern, the president of the company, is said to listen to every single chiming watch the manufacture produces, before sending the timepieces out to retailers?and?their future owners. Therefore, it was expected that Patek would?incorporate the chiming mechanism in their?175th anniversary model-and we are not disappointed. The highly complex?and completely in-house designed and manufactured movement?features a unique chiming mechanism: beyond the grande and petite sonnerie (automatic chimes for every passed hours and quarters), and the minute repeater, it also includes two other, highly unusual chiming complications.For one, in the 5175R-001 there is?an alarm whereas the alarm chimes the set time (say, for 8:15 it chimes 8 hours and one quarter-hour tone), and second,?a date repeater function. Thats right, a repeater that chimes the date: after pressing the button at the 4 oclock position it will chime a combination of high and low tones for every 10 days, and then it will chime the single digits as it would chime the minutes.?Therefore, the Patek Philippe Grandmaster Chime 5175 is not only true to its name, but it may very well be the most complicated chiming wristwatch ever made.Speaking of the date, the secondary dial of the Patek Philippe Grandmaster Chime 5175 is dedicated to the perpetual calendar, which features four subdials and a display-sounds complex enough, so lets see what every one of these do, one by one. The larger dial at the 12 oclock position of the case-back displays the time on a 24-hour display-likely serving as a GMT display, beyond the primary?time display seen on the other dial. In the center is a display for the year, which is located between the subdials for the day and month indications.?Finally, at the 6 oclock position, is a display for the date, as well as the leap year.In conclusion, the the Patek Philippe Grandmaster Chime 5175R will go down in Patek history as a remarkably complex piece with a more divisive design. Only seven?Patek Philippe Grandmaster Chime 5175R-001 watch will ever be produced-six for clients and one for the Patek Philippe Museum-and the?price will be 2.5 million Swiss francs, or about $2.6 million each. patek.comTech Specs from Patek Philippe:Patek Philippe 5175R-001Mechanical manually wound movementCaliber 300 GS AL 36-750 QIS FUS IRMPatek Philippe Grandmaster ChimeBright silvery luster dialsTime side with hand guilloched center and applied gold Roman numerals18K solid gold dial platesAlligator strap with square scales, hand-stitched, dark brown, hand-patinatedSolid gold fold-over clasp, fully hand-engravedReversible case, fully hand-engraved with a decoration of laurel leavesCase is humidity and dust protected only (not water resistant)Rose goldDiameter: 47.4 mmHeight: 16.1 mmCommemorative limited edition of 7 timepiecesSix will be sold and one will be part of the Patek Philippe Museum CollectionMechanical manually wound movementCaliber 300 GS AL 36-750 QIS FUS IRMGrande Sonnerie, Petite Sonnerie, minute repeaterStrikework mode display (Silence/ Grande Sonnerie/Petite Sonnerie)Alarm with time strikeDate repeaterMovement power-reserve indicatorStrikework power-reserve indicatorStrikework isolator indicatorSecond time zoneSecond time zone day/night indicatorInstantaneous perpetual calendarDisplay of day and monthDate display (on both dials)Leap year cycleFour-digit year displayMoon phases24-hour and minute subdialCrown position indicator (winding [R], alarm setting [A], timesetting [H])Case diameter: 37 mmHeight: 10.7 mmNumber of parts: 1,366Movement power-reserve: 72 hoursStrikework power-reserve: 30 hoursBalance: Gyromax?Frequency: 25,200 semi-oscillations/ hour (3.5 Hz)Balance spring: Spiromax?Hallmark: Patek Philippe SealPatek Philippe Grandmaster Chime Ref. 5175 The 20 complications1. Grande Sonnerie2. Petite Sonnerie3. Minute repeater4. Strikework mode display (Silence/Grand Sonnerie/Petite Sonnerie)5. Alarm with time strike6. Date repeater7. Movement power reserve indicator8. Strikework power reserve indicator9. Strikework isolator display10. Second time zone11. Second time zone day/night indicator12. Instantaneous perpetual calendar13. Day of week display14. Month display15. Date display (on both dials)16. Leap year cycle17. Four- digit year display18. 24 hour and minute subdial19. Moon phase20. Crown position indicator (RAH) [...]