




F.P. Journe Chronomètre Optimum Ref. CO
The F.P.Journe Chronomètre Optimum, reference CO, houses the manually wound Calibre 1510 in 18K rose gold, available in 40mm or 42mm cases of platinum or 18K 6N gold, with an overall height of 9.5mm. The movement brings together a remarkable concentration of horological engineering rarely combined in a single watch, two parallel mainspring barrels, a one second constant force remontoire at 11 o'clock, and the High-Performance Bi-axial Escapement (EBHP), an oil free direct impulse escapement with titanium arbor and wheels inspired by eighteenth century natural escapements. The result is a natural dead beat seconds function visible on the case back, where the seconds circle is screwed directly to the movement's bridges, framing the mechanism in 18K rose gold finished with circular graining, Geneva waves and polished, chamfered screw heads.
On the dial, off centre hours and minutes sit at 3 o'clock, a small seconds counter at 9 o'clock, and the power reserve indicator at 6 o'clock, all set against white gold or 5N gold dials with whitened guilloché silver detailing and blued steel hands. The calibre runs at 21,600 vibrations per hour with a power reserve of 70±2 hours, the first 45 hours of which benefit from constant amplitude thanks to the remontoire mechanism. Originally designed by François-Paul Journe in 2001, the Chronomètre Optimum represents the culmination of his research into isochronism and friction reduction, marking the first watch to combine the constant force remontoire with a natural dead beat second in a single calibre, and remains one of the most technically accomplished references within the Classique collection.
Taxes & Shipping
Domestic Delivery - we ship your order of stock items within 1-2 working days from the time of order. If this is inconvenient please, let us know a preferred delivery date and we will schedule delivery at your convenience.
International orders (outside the UK) typically arrive within 2–7 days. Shipping, duties, and VAT are not included in the item price and must be paid by the customer. Please check any applicable import fees in your country before ordering, as we are not responsible for these charges.
Technical Specifications
Functions:
Water Resistance: 30m
Bezel Material: Platinum
Bracelet Material: Aligator Leather
Case Material: Platinum
Dial: White Gold with Whitened Guilloché Silver
Case Size: 40mm
Movement: Manual Winding Calibre 1510
Xanco Jewellers is an independent retailer and not an authorised dealer of the brands we carry. We source our watches from trusted suppliers to guarantee authenticity.
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