Master Control Diadem Collection by Jaeger-LeCoultre

With their subtly refined nuances, the Master Ultra Thin and Master RÉserve de Marche gem-set models feature an elegance governed with timeless authority by Belle Horlogerie, a legacy of the know-how encompassed within the Manufacture.

Blending sensuality and gentleness, the Master Ultra Thin and RÉserve de Marche gem-set models display a vocation for elegance. Characterised by their pure, uncluttered lines, the watches are clothed in femininity to shape the contours of a delicate temporality, a world where beauty is far more than skin deep. Exuding a refined and discreet style, their gentle shades of ivory and amarathine bask in the glowing halo of the 80 diamonds illuminating the 18-carat white gold bezel.

An unprecedented and amazingly subtle combination that calls for exceptional know-how and draws on the skills of the many professions united within the Manufacture.
In thus exalting the dial and exploring the subtle realms of refined colours, designer Magali MÉtrailler has focused on purity, the very essence of these creations. Watches ennobled by references to aesthetic codes: a pair of iridescent shades, shimmering satin strap, inspired stylistic effects, translucent sapphire crystal case-back, a classicism enhanced by a touch of sophistication...
Crafted in harmony with the most eminent traditions of mechanical watchmaking, the Master Ultra Thin and Master RÉserve de Marche gem-set models symbolise the intrinsic Jaeger-LeCoultre values: know-how and a spirit of technical and aesthetic perfection. However, they are not merely an expression of supreme sensitivity. Skilfully borrowed from Belle Horlogerie, they share the ability to assert far more than just their outward appearance. Entirely in keeping with the rigorous principles of the Master control test, they underscore horological refinement through the most ardent watchmaking passion.
Admired for both the finesse and the reliability of its movement, the Master Ultra Thin takes mechanical performance to the extreme limits of miniaturisation. It is living proof that even the greatest techniques and sophistication can be easily accommodated within a limited space.
Meanwhile, the Master RÉserve de Marche comprises one of the most sought-after complicated mechanisms in mechanical watchmaking. In addition to showing the time and date, the dial also indicates the quantity of energy supplied by the oscillating weight with 22-carat gold segment. A complex differential gearing system drives the power-reserve indicator and converts the energy accumulated by the mechanical manually-wound movement, Jaeger-LeCoultre Calibre 928, into units of time. The off-centred power-reserve aperture, a much coveted useful complication, thus gives the function a decorative role radiating a unique horological charm.

Master Réserve de Marche Diadem Collection:

Movement:
 mechanical automatic Jaeger-LeCoultre Calibre 928, crafted, polished and decorated by hand
 28,800 vibrations per hour
 power-reserve of 40 hours
 256 parts
 45 jewels
 4.85 mm high
 22-carat oscillating weight segment

Functions:
 hours, minutes, small seconds at 6 o'clock, date, power-reserve indication

Dial:
 sunray-brushed amaranthine or ivory, transferred floral numerals, appliquÉ dagger-shaped hands in rhodium-plated gold

Hands:
 hours and minutes: dauphines, in rhodium-plated brass
 small seconds, date and power-reserve in rhodium-plated brass

Crown :
 1 crown to wind the watch as well as to adjust the hours and minutes
 1 corrector at 2 o'clock to adjust the date

Case:
 Ø 37 mm in steel
 cambered sapphire crystal, hardness N°9
 sapphire crystal case-back revealing the movement
 water-resistant to 50 metres

Bezel:
 bezel in 18-carat white gold, set with 80 diamonds (approx. 0.56 ct.), F-G Top Wesselton, VVS1

Strap :
 satin, 19/16, amaranthine or ivory-coloured, matching the dial colour, with 16 mm steel folding buckle

References: Ivory-coloured model 148 84 01 Amaranthine model 148 84 02 Master Ultra Thin Diadem Collection

Movement:
 mechanical manually-wound Jaeger-LeCoultre Calibre 849, crafted, polished and decorated by hand
 21,600 vibrations per hour
 power-reserve of 35 hours
 approximately 123 parts
 19 jewels
 1.85 mm high

Functions:
 hours, minutes

Dial:
 sunray brushed amaranthine or ivory-coloured dial, transferred floral numerals, dagger-shaped applied hour-markers in rhodium-plated gold

Hands:
 hours and minutes: dauphines in rhodium-plated brass

Crown:
 1 crown to wind the watch as well as adjust the hours and minutes

Case:
 Ø 34 mm in steel
 cambered sapphire crystal, hardness N°9
 sapphire crystal case-back revealing the movement
 water-resistant to 50 metres

Bezel:
 bezel in 18-carat white gold, set with 84 diamonds (approx. 0.36 ct.) F-G Top Wesselton, VVS1

Strap :
 satin, 17/16, amaranthine or ivory coloured to match the dial, with 16 mm steel folding buckle

References: Ivory-coloured model145 84 01 Amaranthine coloured model145 84 02

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Source: JLC media release