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| A Whirlwind Inside a Bubble - CorumBy: BIZCOM The legendary Corum Bubble is all about its case and crystal, a sensuously formed case with a gigantic sapphire crystal that rises relentless upwards. Now Corum has infused the traditional arts of high horology into the Bubble for the very first time, with a pair of Bubble tourbillons in rose gold. Perhaps the most complicated Bubble ever, the Bubble Tourbillon Chronograph combines two of horology's most revered complications: Shaped like the Corum key logo, the tourbillon cage is visible at 10 o'clock, giving life to the dial as it makes one revolution a minute. Operated with two pushers on the case, the chronograph records the seconds on the central axis, while the minutes are counted on the register at six o'clock. As is essential for a true haute horlogerie timepiece, the chronograph is controlled with a column wheel that functions as an on-off switch. This is both more refined and complex than the cam found in industrially produced chronographs. Equipped with the similarly exclusive, automatic CO397, the Bubble Tourbillon GMT features a tourbillon regulator and a second time zone display. Displayed on a rotating disc at six o'clock, the second time zone can be swiftly advanced in hourly intervals via the pusher at four o'clock. The second time zone is read in tandem with the day and night indicator at eight o'clock. To emphasize the optical effects of the massive Bubble sapphire crystal, both tourbillons are fitted with pale grey dials decorated with a concentric guilloche that accentuates the contours of the dial. And as befits high complications, the Bubble Tourbillon GMT and Tourbillon Chronograph feature hand-finished movements decorated with traditional techniques like chamfering and straight graining. They share the same, iconic Bubble watchcase, hewn from a block of 18k rose gold and polished to a mirror finish. Each is limited to just five pieces. Technical Specification Bubble Tourbillon GMT Reference L397/02976 - 397.100.55/0001 BG01 Limited Edition Movement Caliber CO397 - Automatic watch Functions Hours, minutes, date, 2nd time zone, day/night indicator, tourbillon Power reserve 50 hours Frequency 4 Hz, 28,800 vph Size 16 ½"' Jewels 28 Distinctive feature Black ruthenium-treated bridges and mainplate, Corum key-shaped tourbillon Case Size 47 mm Thickness 21.00 mm Material 5N 18K rose gold Glass Domed sapphire crystal with anti-reflective treatment Caseback Sapphire crystal back with anti-reflective treatment Water resistance 30 m/ 3 ATM Dial Material Brass Colour Grey with decorative white circles Gemsetting Hands Shape Openworked obelisk Material Brass Distinctive feature 5N gold-toned Strap Material Alligator, black Alzavel calfskin lining Color Black Lug width 24/20 mm Buckle Material 5N 18K rose gold Type of Buckle Pin Buckle Bubble Tourbillon Chronograph Reference L398/02977 - 398.100.55/0001 BG01 Limited Edition Movement Caliber CO398 - Automatic watch Functions Hours, minutes, chronograph, date, small seconds hand, tourbillon Power reserve 45 hours Frequency 4 Hz, 28,800 vph Size 16 ¼"' Jewels 28 Distinctive feature Black ruthenium-treated bridges and mainplate, Corum key-shaped tourbillon Case Size 47 mm Thickness 21.00 mm Material 5N 18K rose gold Glass Domed sapphire crystal with anti-reflective treatment Caseback Sapphire crystal back with anti-reflective treatment Gemsetting Water resistance 30 m / 3 ATM Dial Material Brass Colour Grey with decorative white circles Hands Shape Openworked obelisk Material Brass Distinctive feature 5N gold-toned Strap Material Alligator, black Alzavel calfskin lining Color Black Lug width 24/20 mm Buckle Material 5N 18K rose gold Type of Buckle Pin Buckle End
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