This Sunday (May 15), Antiquorum is presenting its Important Modern and Vintage Timepieces auction at Geneva's Mandarin Oriental.

More than 500 carefully selected vintage and modern timepieces, pocket watches, and clocks will be offered for sale. Previews will take place in Hangzhou, Shanghai, Beijing, Hong Kong and Geneva.

One of the major highlights of the sale, the exquisite Breguet silver carriage clock with 10 complications, was sold to the Marquise de Béthisy on May 6^th, 1878. Breguet introduced his silver humpback carriage clocks - of which only a few were ever made - circa 1812.

The present clock is the most complicated of the eleven Breguet humpback carriage clocks known to exist. It has a total of 10 complications: grande sonnerie striking; petite sonnerie striking; alarm; perpetual calendar; days of the week; date; months; years, moon phases and equation of time.

The extraordinary 10-complication Breguet clock

It is the only known example with a quadruple digital perpetual calendar, and carries an estimate of 150,000-200,000 Swiss Francs (roughly $150,000-200,000).

In the category of fine pocket watches, connoisseurs will be excited to see the Louis Audemars "Grande Complication - "La Russe II", No. 12199, retailed by G. Aspe, Paris in 1896.It is expected to sell for CHF150,000-200,000.

This unique timepiece is one of the most important complicated watches of the 19^th century, with double perpetual calendar for both Julian and Gregorian systems, as well as minute-repeating, two time zones, chronograph, central 60-minute register, moon phases, lunar calendar and "reference d'heure" world-time calculation chart functions.

Audemars Grande Complication watch

Antiquorum is also celebrating the 80^th anniversary of the iconic Reverso watch with a selection of 30 exceptional Reversos, including original pieces from 1931, emblematic and ultra-rare versions with colored dials, limited series with complications, and watches with enamel-decorated case backs.

Among the modern Reverso wristwatches, the highlight is "Mucha's Four Seasons" No. 1/25, Ref. 276.1.62, a set of four enameled pieces introduced in the 1990s and made in a limited edition of 25 sets.

On the back of each case, an exquisite painted on enamel portrait of a woman symbolizes each of the four seasons. Miklos Merczel, the manufacture's remarkable enamel artist, devoted dozens of hours to the creation of each piece. The set is listed at CHF20,000-30,000.

Finally, for the Patek Philippe collector, Antiquorum experts are offering a Patek Philippe Reference 130, with pink dial - as confirmed by the extract from the archives - bearing an estimate of CHF150,000 - 200,000.

This very rare "Staybrite" stainless steel wristwatch with square button chronograph, register and tachometer scale was made in 1941 and was sold on March 3, 1943. It will make an excellent investment.