The Chronometrie 2009 was recently held to celebrate the 50th anniversary of the watch museum in Le Locle. Only 16 watches entered the competition, of which two Jaeger-LeCoultre watches won. The winner was the Master Tourbillon, which gained on average .13 seconds a day, or less than 47.5 seconds a year and its rate did not vary more than .28 seconds a day. The Master Tourbillon uses a silicon escapement, which is more accurate than any other watch in this competition.

Here is a list of all the watches that were in the competition. I was surprised to see that AP decided not to enter their Jules Audemars with the AP escapement, which runs at 43,200 vph.