Jaeger-LeCoultre Master Ultra Thin Minute Repeater Flying Tourbillon
Introduced in 2014, the Minute Repeater Flying Tourbillon fits two key complications in the existing Master Ultra Thin case:
- A minute repeater, consisting of two sapphire gongs welded to the rear crystal (as in the 2005 Master Minute Repeater) hit by Jaeger-LeCoultre's "trebuchet" hammers, introduced in the 2009 Duomètre à Grande Sonnerie. This minute repeater can also skip "silent" quarters, a new feature for Jaeger-LeCoultre.
- A new "flying" tourbillon and balance wheel affixed only at the rear of the case.
Adding to the difficulty of design and manufacture, these complications are fitted into the Master Ultra Thin case, measuring just 41 mm in diameter and 7.9mm thick. This is the thinnest minute repeater ever made, beating the 8.09 mm Vacheron Patrimony Contemporaine Ultra Thin Cal 1731 and 9.04 mm Piaget Emeprador Minute Repeater.
Another innovative feature of the Master Ultra Thin Minute Repeater Flying Tourbillon is the peripheral winding system: Rather than placing the weight segment at the rear of the movement, this watch features a platinum weight along the perimeter. It is visible through cutouts in the dial and rides on ceramic bearings. Although it turns in both directions, the weight only winds in the clockwise direction.
The Master Ultra Thin Minute Repeater Flying Tourbillon is made from 18 Carat extra white gold and is limited to 75 pieces.