Courtesy Sotheby's
The Henry Graves 'Supercomplication' timepiece sold for $24 million at Sotheby's 2014 Important Watches sale, breaking its own record for a watch sold at auction.
Sotheby's
It boasts 24 separate "complications", a technical term meaning a functionality other than timekeeping.
Sotheby's
The timepiece's most impressive feature is a "celestial map", which charts the movement of the stars above its former owner's Fifth Avenue apartment.
Sotheby's
It is comprised of 900 separate parts, a remarkable feat of engineering from the pre-computer age. But it wasn't the only timepiece to sell for a substantial sum.
Courtesy Sotheby's
The next most valuable lot, also from Swiss luxury watchmaker Patek Philippe, sold for $339,564.
Courtesy Sotheby's
This 1972 Patek Philippe, which may be the only one of its kind, is engraved with the emblem of Oman. It sold for $320,986.
Courtesy Sotheby's
A Patek Philippe watch from Sotheby's New York's Andy Warhol collection sold for $302,408.
Courtesy Sotheby's
This Patek Philippe pocket watch from 1904 sold for $277,638.
Courtesy Sotheby's
This recent Patek Philippe watch (it was made in 1998) sold for $197,133. Its bezel is made of white gold.
Courtesy Sotheby's
A Cartier Mystery Clock made of silver gilt, diamond, mother-of-pearl, smoky quartz and coral sold for $215,711.
Courtesy Sotheby's
A rare Daytona "Paul Newman" Rolex from circa 1968 sold for $252,867.
Courtesy Sotheby's
This Rolex Explorer II Steve McQueen wristwatch sold for $252,867.
Courtesy Sotheby's
This Rolex chronograph wristwatch from the early 1950s sold for $221,904.
Courtesy Sotheby's
This Audemars Piguet triple-calendar watch, which was made in 1924, sold for $209,518.

Story highlights

The Henry Graves Supercomplication watch sold for $24.4 million

It is the most expensive watch to sell at auction, smashing its own record of $11 million

Made by Patek Phillipe in 1933, it's most advanced timepiece made by hand

The watch has 24 functions other than telling time

CNN  — 

The most “complicated” handmade watch in the world has been sold at auction for an historic $24.4 million.

The Henry Graves Supercomplication timepiece, made by the luxury watchmaker Patek Philippe in 1933 for the prominent banker Henry Graves, was sold at Sotheby’s in Switzerland.

The sale smashed the world record for the most expensive watch ever sold at auction, which was previously held by the same watch. In 1999, it was sold to Sheikh Saud Bin Mohammed Bin Ali Al-Thani of the Qatari royal family, for $11 million.

The watch was released in 2014 to coincide with the 175th anniversary of the Swiss watch maker. The sale has benefited from the boom in Patek Phillippe auction values over the last 15 years.

The term “complication” is a technical one, and refers to any aspect of a watch that offers a function that is not simply telling the time.

The timepiece – which has been called “the most important watch in the world,” “one of the wonders of the world,” and “the collector’s holy grail” – boasts 24 such complications.

These include grande and petite sonnerie (chimes), which emulate the bells of Westminster; a record of the phases and age of the moon; sunrise and sunset indications; a “perpetual calendar” that makes automatic adjustments for month and year; and a celestial map of the New York sky.

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The celestial map alone is a remarkable feat of engineering. It charts the precise spacing and density of the stars, and rotates at the same pace as the sky as it would have appeared from its owner’s Fifth Avenue apartment.

The watch is comprised of 900 individual parts, and, according to Sotheby’s, is the most advanced timepiece ever made without the assistance of computers. It was last wound in 1969, yet remains in perfect working order.

The Supercomplication was made as the result of a friendly competition between Graves, a member of a well-known banking family, and James Ward Packard, the luxury automobile manufacturer, to see who could produce the most impressive timepiece.

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Packard’s attempt was a pioneering feat. It was the first ever watch to feature a sky chart, which included 500 golden stars and was centered above his home in Ohio.

However, it contained just 10 complications, making Graves’ timepiece the undisputed winner with 24.

One of the Supercomplication’s more obscure features is a sidereal time dial, which tracks the Earth’s rate of rotation in relation to fixed stars. A “sidereal day”, which is used by astronomers, lasts for 23 hours, 56 minutes and 4.1 seconds. It is unclear whether Graves had any use for the functionality.

“It’s amazing that they did all that without computers,” says Larry Pattinelli, the president of Patek Phillippe. “You are talking about one of the most collectible pieces ever put up for auction, if not the most collectible.”

The Supercomplication took Patek Phillipe eight years to produce, from its commission in 1925 to delivery in 1933. The identity of the new buyer is unknown.

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