Buren – Grand Prix Automatic – Micro-Rotor Movement Stainless Steel – Silver Dial – Date Offered for auction is a refined and historically important Buren Grand Prix Automatic, a timepiece representing one of the most innovative chapters in Swiss watchmaking. Buren is renowned for its pioneering micro-rotor technology, a major technical breakthrough that allowed the creation of slimmer automatic watches without sacrificing winding efficiency. This Grand Prix model is a beautiful example of that heritage. Technical Details: Brand: Buren Model: Grand Prix Automatic Case Material: Stainless Steel Case Diameter: 34 mm (excluding crown) Crystal: Acrylic glass Dial: Silver dial with applied baton hour markers and applied Arabic numeral at 12 Functions: Hours, Minutes, Central Seconds, Date at 3 o’clock Water Resistance: Untested for water resistance Movement: Swiss Automatic Micro-Rotor movement (rare configuration) Jewels: 25 Jewels (as visible on movement) Caseback: Stainless steel, signed Buren Grand Prix Super Slender Automatic Strap: Generic black leather strap Wrist Size: Fits up to approximately 20 cm wrist Condition: Grade B – visible signs of wear consistent with age and careful use Box: Generic box included The silver dial displays a soft vintage patina, giving the watch authentic character and depth. Applied baton indexes and the raised Arabic “12” create a classic mid-century aesthetic, while the framed date window at 3 o’clock enhances functionality. The stainless steel case shows honest signs of age, including light scratches and wear marks consistent with a vintage piece. The acrylic crystal is period-correct and contributes to the warm vintage appearance. The highlight of this watch is its rare Swiss automatic micro-rotor movement. As visible in the movement photos, the mechanism is beautifully constructed with 25 jewels and fine finishing. The micro-rotor system integrates the oscillating weight into the movement plate, reducing thickness and showcasing Buren’s technical innovation. The movement is signed “Buren Grand Prix Swiss Made,” confirming authenticity. Story & Heritage: Founded in Switzerland, Buren became one of the most technically forward-thinking manufacturers of the 20th century. In the 1950s and 1960s, the brand gained recognition for its micro-rotor automatic movements, which were revolutionary at the time and later contributed to the famous Chronomatic project alongside other major Swiss brands. The “Super Slender” concept reflected Buren’s ambition to create elegant, thin automatic watches suitable for daily wear and formal occasions alike. The Grand Prix line represented quality, innovation, and prestige within the brand’s collection. This example embodies that spirit — a compact 34 mm case paired with advanced mechanics and timeless design. It is a wonderful opportunity for collectors who appreciate historically important Swiss engineering and understated vintage elegance. The watch will be carefully packed and shipped insured. Express Delivery Via UPS Express Internal Reference Number - Itm. 680