Now Price:US $248.59/ piece
List Price:US $428.6
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Brand new Breguet Perpetual Calendar Tourbillon, Model # 3750BA/13/2VU.
18kt yellow gold 40mm case. Sapphire crystal glass. Cream dial with Roman numeral hour markers and Arabic numerals. 18k yellow gold crown. Crocodile leather strap with 18k yellow gold pin buckle. Hours, minutes, seconds, retrograde date, day, month, leap year and tourbillon display. Date window at 12 o'clock position. 18k yellow gold bezel. Manual wind movement. Breguet Caliber 558 QPT; 21 jewels; 18,000 vph, red gold plates and bridges, completely hand-engraved; one-minute tourbillon. Power reserve up to 50 hours. Waterproof 30 meters / 100 feet. Retrograde �C display does not display the function in a circular fashion, as we are used to seeing. Rather, it sets out the functions in a linear manner. Instead of the hands going round in a circle, they travel along an arc, and when they get to the end, they jump back to the beginning. Tourbillon �C compensates for differences in rate caused by a watch adopting different positions. The principle is to mount the balance and escapement in a rotating cage. The balance & escapement rotate around their common axis going through all positions to average out the errors, Tourbillon cages or platforms usually rotate once per minute. The Tourbillon complication is an extremely difficult accomplishment to achieve and generally demands a high premium.
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