Optimum Chronometer by F.P. Journe in Platinum
Movement: Manual-wind 44j Calibre 1510 in rose gold, with high-performance biaxial escapement, natural deadbeat seconds, and two mainspring barrels
Case: 42mm case in platinum, with display back and knurled crown
Dial: Matte grey dial with remontoir at 11 o'clock, registers with hours at 3 o'clock and 9 o'clock, and power reserve indicator
With fitted box, warrantee and product literature.
François-Paul Journe first conceived of the concept for the Chronomètre Optimum in 2001. Designed with the aim to reduce internal friction, the Chronomètre Optimum shares the double barrels of its predecessor, the Chronomètre Souverain. The remontoir d'egalité system, seen in the earlier Tourbillon Souverain, ensures that the force generated by the double barrels remains balanced throughout the mechanism of the movement.
In addition to the remontoir, the Chronomètre Optimum features a newly-designed escapement which Journe patented as the "EBHP direct impulse escapement." The High-Performance Bi-Axial Escapement features two wheels and functions without oil or lubricant, a traditional method first employed in escapements from the 18th-century. As a result, the EBHP divides the pressure of the escapement wheels, giving it a 50-hour power reserve.