Buren Grand Prix - Super slender

With micro-rotor, ca 1960. Diameter 34mm (excluding crown). Apart from a blemish on the dial between the 4 & 5 o’clock, it has been completely overhauled and is in perfect working order.

In 1954, Buren patented the first ever "micro-rotor” automatic watch movement which allowed it to produce the flattest possible automatic watches. By shrinking the diameter of the rotor (to fit within the radius of a comparable movement), and locating this rotor in the same plane as other components of the movement, Buren avoided the need to place the rotor behind the movement. Buren's first watches using the micro-rotor were the "Super Slenders" (calibers 1000 and 1001), introduced in 1957, with this automatic system also known as the "Intramatic" system.

The micro-rotor made possible the first automatic chronographs.

Buren also licensed its technology to other companies, including IWC, Baume & Mercier, Bulova, Hamilton and Breitling. After a patent dispute, Buren also began to license its micro-rotor technology to Universal Geneve.

Serviced with a 12 month warranty.

R9900

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