F. P. Journe. A very fine and rare platinum tourbillon wristwatch with power reserve and remontoire displaying dead beat seconds
Tourbillon Souverain, Remontoire d'Egalite avec Secondes Morte, No. 360 – TN, sold 2007
26-jewel Cal. 1403 manual winding movement of 18K rose gold, right angle lever escapement in polished steel tourbillon carriage, free sprung monometallic balance with overcoiled spring, constant force to the train supplied by leaf spring controlling independent seconds, circular black dial with aperture to view escapement and tourbillon carriage, arabic hour and minute display at 3 o'clock, subsidiary dead beat seconds at 6 o'clock, 42 hour power reserve sector, blued steel hands, polished platinum case with transparent back secured by 6 screws, maker's leather strap with 18K white gold deployant clasp, accompanied by display box with outer packaging, and warranty card, case, dial and movement signed. 40mm
26-jewel Cal. 1403 manual winding movement of 18K rose gold, right angle lever escapement in polished steel tourbillon carriage, free sprung monometallic balance with overcoiled spring, constant force to the train supplied by leaf spring controlling independent seconds, circular black dial with aperture to view escapement and tourbillon carriage, arabic hour and minute display at 3 o'clock, subsidiary dead beat seconds at 6 o'clock, 42 hour power reserve sector, blued steel hands, polished platinum case with transparent back secured by 6 screws, maker's leather strap with 18K white gold deployant clasp, accompanied by display box with outer packaging, and warranty card, case, dial and movement signed. 40mm
Sold for
US$ 92,500
inc. premium
Footnotes
- The Tourbillon Souverain uniquely combines three desirable, but difficult to achieve, refinements that contribute to the precision of the wristwatch. The best known of these, the tourbillon carriage, rotates the escapement continuously to minimize the effect of position (in other words, gravity) on the rate of the watch.
A refinement less well known is the remontoire (i.e. "rewinder"). Seldom employed outside of precision clocks, this device is placed in the train between the mainspring and escapement to deliver a constant flow of power to the watch. In practice, it is a second spring, rewound at short intervals by the mainspring. It is effectively fully wound at all times and thus applies a "constant force" to the escapement.
Finally, the seconds hand is advanced incrementally by means of the remontoire at one second intervals. These "secondes mortes" offer the same precision as a regulator with dead beat escapement.
Category: Clocks and Watches / Watches
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