Jaeger-LeCoultre extends its Master Ultra Thin Collection with two new references

The Master Ultra Thin Power Reserve and Master Ultra Thin Tourbillon Enamel now join the line
Jaeger-LeCoultre has unveiled its celebrated Master Ultra Thin collection of dress watches with new updates in the movement as well as the aesthetics. The timepieces introduced in the line are the Master Ultra Thin Power Reserve (Ref. Q137258J) and Master Ultra Thin Tourbillon Enamel (Ref. Q13224E1). Both watches are crafted in 18K pink gold, finished with blue alligator strap, and are water resistant up to 50 metres. 

Master Ultra Thin Power Reserve (Ref. Q137258J)

The highlight of this model is its updated Calibre 938. The new-generation Jaeger-LeCoultre Calibre 938 boasts a power reserve of about 70 hours. To achieve the significant power reserve, the Maison kept the size of the calibre unchanged, but redesigned it with a renovated mainspring barrel, and crafted some key components with silicon to reduce friction and ensure smoother energy transmission. 

Aesthetically, the watch’s size remains same i.e 39mm as the Master Ultra Thin Power Reserve, but the lugs are now slimmer and elongated. Retaining the balance and symmetry is the new gradient sunray blue dial, which now has a more legible date counter at 3 o’clock, small seconds at 6 o’clock, a power reserve indicator between 10 and 11 o’clock, and elongated hour markers. 

Master Ultra Thin Tourbillon Enamel (Ref. Q13224E1)

A new interpretation of the Master Ultra Thin Tourbillon Enamel, the latest 40mm reference in the line, features a striking hand-guillochéd blue Grand Feu enamel dial. There are 180 ‘sun rays’ on the dial made with six passages of the hand-operated rose engine lathe, making 1,080 lines altogether in a perfect harmony. 

There is a contrasting date sub-dial located at 12 o’clock, hand-guilloché in a circular pattern, known in French as azurage. The blue colour is achieved with applying Grand Feu enamel in multiple layers (one layer at a time) with controlled firing and cooling. Further, the dial has a tourbillon at 6 o’clock, incorporated with a laser-engraved seconds counter on its outer edge and applied indexes and Dauphine hands. 

Powering the timepiece is the latest generation of Jaeger-LeCoultre Calibre 978, offering a 45-hour power reserve; this calibre won an international chronometry prize in 2009, in its launching year. 

Images: Courtesy Brand

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