Jaeger-LeCoultre: Master Grande Ultra Thin in Black


Jaeger-LeCoultre is launching a new Master Grande Ultra Thin with a black dial. It is being delivered to retailers as this is written. The 40mm Master Grande Ultra Thin is powered by Jaeger-LeCoultre caliber 896 with small seconds, which belongs to the 899 generation of new movements. Made up of 242 parts, it measures only 3.98 mm thick, and it incorporates the features of the brand’s new automatic calibers: the variable-inertia balance ensuring the constancy of the rate and enhanced sturdiness; ceramic ball-bearing mechanisms requiring no lubrication or maintenance; and a frequency of 28,800 vibrations per hour.

Ultra-thin watches are in JLC’s blood. In 1903, Jacques-David LeCoultre rose to Edmond Jaeger’s challenge to create the “world’s thinnest movements”. In 1907, their encounter gave rise to LeCoultre Calibre 145 – a Lépine 17-ligne pocket-watch – the thinnest in the world at just 1.38 mm and still the record-holder in its category. It also inspired the creation of one of the most prodigious collections of ultra-thin calibers ever.


Master Grande Ultra Thin: technical characteristics

• mechanical automatic, Jaeger-LeCoultre Calibre 896,
• crafted, assembled and decorated by hand
• 28,800 vibrations per hour
• 43-hour power reserve
• 242 parts
• 34 jewels
• 3.98 mm thick

• hour, minute, small seconds at 6 o’clock

• sunray-brushed silver-coloured or beige
• rhodium-plated or gilded applied dagger-shaped hour-markers

• hour and minute: rhodium-plated or gilded brass facetted dauphine type

• 1 crown to wind the watch and to adjust the hours and minutes

• Ø 40 mm in 18-carat pink gold or steel
• cambered sapphire crystal, hardness N°9
• sapphire crystal case-back revealing the movement
• water-resistant to 50 meters

• alligator leather with folding clasp in steel or 18-carat pink gold, pin buckle in 18-carat pink gold
• steel bracelet

• steel/leather: 135 84 20
• steel/steel: 135 81 20
• 18-carat pink gold/leather (folding clasp): 135 24 20
• 18-carat pink gold/leather (pin buckle): 135 25 20

Share This Page

    About Mike Disher

    My name is Mike Disher and I am WatchTime's technical editor. My interest in watches dates to 1972 and I caught the internet bug in 1997. In 1999 I combined these interests by joining TimeZone.com as its first full-time employee, and later that year I attended my first Basel Fair. I managed TZ from 2000-2007, and in 2008 I joined WatchTime.

    Leave a comment