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Bulgari - Octo Finissimo Tourbillon

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With the new Octo Finissimo Tourbillon, presented at Baselworld 2014, Bulgari achieves a record with the thinnest tourbillon movement on the market.
The tourbillon cage determined the overall thickness of the entire movement, a mere 1.95 mm. This manufacture hand-wound movement, beating at 21,600 vibrations per hour, incorporates two bridges, one for the minute wheel and the other for the gear train of the tourbillon cage, which rotates once a minute.
Bulgari was able to create such a thin tourbillon movement by omitting a regulator assembly and adjusting timing on the balance wheel directly. It was also essential to adopt ball bearings for the moving parts: seven ball bearings are positioned on the basic movement, while the tourbillon cage has a cartridge bearing that allows it to pivot. The final ball bearing lets the escape wheel pivot.
Another significant development for this watch is how the barrel remains in position guided by three ball bearings around the outer edge. The height of the spring was able to be doubled due to this and as a result yields a power reserve of close to 55 hours. 
The platinum case has a diameter of 40 mm and a total thickness of 5 mm. The polished black lacquered dial makes the tourbillon stand out.
The Octo line keeps expanding with a wider range of sizes and complications, adding the Octo Finissimo Tourbillon to the ultra-thin solo tempo model and to the chronograph version.

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