Last week, during Patek Philippe’s 175th celebration in Geneva, the prestigious watchmaker launched 10 new references. The highlight was the Grandmaster Chime Ref. 5175R.

Watch the video to truly appreciate what went into this unprecedented, horological work of art.

The Grandmaster Chime features rotating lugs to switch between the two dials and is presented in an 18K rose gold case measuring 47.4 mm by 16.1mm. The case is made up of 214 components and the entire exterior is decorated with intricate engravings, that were completely done by hand. The movement itself, caliber 300 GS AL 36-750 QIS FUS IRM, measures a whopping 37 mm by 10.7 mm and consists of 1366 components, including 4 mainspring barrels. It took 7 years to develop, 2 years to produce and is the source of six patents.

With 20 complications in total (listed below), this is the most complicated timepiece Patek Philippe has ever produced.

Grande Sonnerie, Petite Sonnerie, Minute repeater, Strikework mode display, Alarm with time strike, Date repeater, Going train power reserve display, Strikework power reserve display, Strikework isolator display, Second time zone, Second time zone day and night indicator, Instantaneous perpetual calendar, Day of week, Month, Date, Leap year, Four-digit year, Moon phase, 24-hour and minute sub-dial, Crown position indicator (winding, alarm setting, and time setting).

Limited to seven pieces, one of which will go to the Patek Philippe Museum, the Grandmaster Chime Ref. 5175R-001 is priced at 2.5 million CHF (or approx. 2.65 million USD).