The Breguet Grande Complication Marie was designed by Swiss watchmaker Abraham Louis Breguet and known as Marie-Antoinette. The watch's manufacture began in 1783 after a mysterious admirer ordered it as a gift for the Queen and it was completed in 1827 by Breguet's son following his father's death.

The Marie-Antoinette perpétuelle, or self-winding, watch boasts a minute repeater that strikes hours, quarters, and minutes on demand, as well as a full perpetual calendar that shows the date, day, and month at two, six, and eight o'clock, respectively. An equation-of-time display at ten o'clock shows the difference between civil and solar time. A huge independent seconds hand, the predecessor to the chronograph hand, is located in the center, while a subdial for the running seconds is located at six o'clock. A bimetallic thermometer and a 48-hour power-reserve indication are placed next to each other.

The self-winding movement (named perpétuelle in Breguet's day) is made up of 823 parts and components, all meticulously polished. Every working part of the motion-work, calendar and repeater mechanisms are built of wood-polished pink gold plates, bridges, and bars. Blued and polished steel screws are used. Sapphires are used in all friction points, sinks, and bearings. The watch's advanced design includes a natural lift escapement, a gold cylindrical balance spring, and a bimetallic balance. The balance-wheel staff and the oscillating weight arbors are protected from blows and jarring by a double pare-chute shock-protection system.

Price: $10 million

This watch is the world's second most expensive Breguet timepiece. The Sympathique watch, designed by Breguet in 1795 and first shown to the public at the Exposition Nationale des Produits de l'Industrie in 1798, was a device that combined a clock and a watch. The pocket watch was held in its cradle by the clock, which mechanically adjusted and rewound it. Breguet coined the term sympathique to represent the idea of harmony and concord.

The extremely rare Sympathique clocks, of which this model is easily the best preserved, complete with working parts thoroughly repaired by the late George Daniels, contributed to the popularity and acclaim of French watchmaker Abraham-Louis Breguet.

It boasts the most complicated Sympathique mechanism of all known examples: the integrated cradle located on the clock's pediment is the only one known to wind, set time, and control its accompanying pocket watch. This exquisite clock was part of Seth Atwood's famed Time Museum collection, and its winding mechanism was restored by Dr. George Daniels, MBE, CBE, the most illustrious Horologist and watchmaker of the twentieth century.

Price: $6.8 million

Breguet Antique Number 2667 or The Breguet & Fils Paris 2667 Precision 4 is also known as the "Montre plate à deux mouvements, sur le principe des chronomètres" and is made by Breguet & Fils, Paris, Number 2667. This example is constructed of precious metals and has an exquisite design that harkens back to a bygone era. The exact date of manufacturing is unknown, however it is thought to be sometime between the Breguet watchmaking company's establishment in 1770 and the watch's sale date in 1814.

The case of Breguet Antique Number 2667 is fashioned of the finest 18k yellow gold and features a circular four-body "forme quatre baguettes" style. The pocket watch case is engraved with a 2667 and an additional case number by Jean Louis-Joly, indicating 1887, for purposes of differentiation. Breguet was recognized for paying meticulous attention to detail in order to ensure that their masterpieces were indisputably unique and recognizable.

The dial has a wonderful light silver background made of machine turned material with a distinctive pattern that is hardly discernible but gives a visual benefit of mild texture. Elegant displays of English and Arabic suspended numerals may be found on the dial. The hands on the left subdial are yellow gold Breguet, while the hands on the right are blued steel. The movement is one-of-a-kind. According to Christies, it is entirely jeweled, with straight line calibrated lever escapements, bimetallic compensating balances of steel and platinum, secured with platinum and gold screws, and blued steel Breguet free sprung balance springs. With the price of $4.24 million, it is listed as one of the most expensive Breguet watches.

Price: $4.24 million

Breguet Grande Complication Antique Number 4111, is a chronometer-based thin flat equation-of-time and repeater watch. Hours, half-hours, quarter-hours, and half-quarters are all repeated on the Breguet watch. This "Grande Complication" watch was bought for more than 2.5 million Swiss francs in 1827. It includes a yearly calendar and a manual perpetual calendar, as well as mean and apparent solar time. A unique technological feat in a "Grande Complication" watch, this antique Breguet watch was constructed incredibly thin. The balance wheel on the Grande Complication Watch has been modified so that it will work as intended, repeating hours, half-hours, quarter-hours, and half-quarters.

In 2012, Breguet president Mark A. Hayek purchased this antique Grande Complication Antique No. 4111 at Christie's auction in Geneva, Switzerland. It is one of the most expensive Breguet antique watches ever sold at auction. This exceedingly rare and thin Breguet design, which dates from 1827 and is based on the chronometer concept, includes an annual calendar, a manual perpetual calendar, and mean and apparent solar time.

Price: $2.56 million

The Breguet Grande Complication Classique Number 5349, one of the most complicated wrist watches in the world, is protected by three patents for its "exceptional precision and technological competence."

Platinum wristwatch with two revolving tourbillons in the classic "Grande Complication" style. Two separate tourbillons attached to a middle plate by a bridge complete a 12-hour rotation. Breguet overcoil balance springs. Hand-wound movement with manual engraving. 107 baguette-cut diamonds, approx. 30.30 carats, paved on the bezel, lugs, and case band. 310 diamonds, approx. 1.62 carats, paved on a silvered gold chapter ring and central plate. Back of sapphire case 3 bar water resistance 50 mm in diameter. The watch face is studded with pave diamonds, and the platinum frame is lined with baguette diamonds, in addition to the spectacular revolving double tourbillon.

Although a few of these watches are still in use, collectors cherish them and they nearly never come up for sale. On demand, Montres Breguet has been known to make bespoke versions for private clients.

Price: $755,000