Breguet La Tradition Men's Rose Gold Tourbillon Power Reserve Swiss Made Mechanical Watch 7047BR/G9/9ZU Polished 18k rose gold case with a finely fluted caseband (41 mm in diameter, 16 mm thick), Sapphire crystal snap-down case-back, Off-centered black-coated 18-carat gold dial at the 7 o'clock position, Silvered hands and Roman numerals Running seconds on the tourbillon carriage at the 1 o'clock position, Titanium upper bridge of the tourbillon carriage, Scratch resistant sapphire crystal, Swiss hand-wound mechanical tourbillon movement with Breguet titanium balance-wheel Swiss straight line lever escapement and silicon balance spring, Caliber 569, Power reserve of 50 hours, Power-reserve indication on the barrel drum, Constant torque ensured throughout the running of the watch thanks to the fusee and chain transmission Water resistant to 3 ATM/30 meters/99 feet, Brown alligator leather strap, Deployment buckle A.-L. Breguets historic invention, the tourbillon regulator, patented in 1801, was conceived to compensate for the errors in rate caused by the constant changes in the watchs position. It consists of mounting the escapement and sprung balance in a mobile carriage which rotates on itself with utter regularity. Errors are thus reproduced regularly and cancel each other out, rather than accumulating. Two centuries later it remains a technical "tour de force" of which few watchmakers are capable.