JLC 919

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Calibre 919 is an automatic perpetual calendar alarm movement from Jaeger-LeCoultre.

Introduced in 1989, Calibre 919 was one of the most ambitious technical achievements for the company, which was recovering from the quartz crisis. It is the pinnacle of development for Jaeger-LeCoultre's Memovox series of calibres and went into the Grand Réveil, a limited-edition watch.

The most notable aspects of Calibre 919 are its two main complications:

  • It features a perpetual calendar with a four-digit date and moon phase indicator
  • It also features the alarm that the Memovox is known for, with the addition of a circumferential brass gong attached to the case

Calibre 919 is the first of a modern series of Memovox movements. It consists of 350 parts.

Specifications

  • 8.3 mm thick
  • 28,800 A/h
  • Double barrel (time and alarm)
    • Bidirectional automatic winding for time
    • Manual winding for alarm
  • 36 jewels
  • Alarm hammer on bronze gong

Jaeger-LeCoultre Alarm Calibres

  • Manual winding
    • 1951-1958 Calibre 489 (also P489 with Parachoc shock resistance) - screwed balance, dual top plates
    • 1952 Calibre 601 - transitional model, fewer than 2,000 produced, with a single top plate
    • 1953-1964 Calibre 814 - improved model (also Parachoc P814 and Kif K814) - screwed balance, single top plate
    • 1962-1979 Calibres 910 and 911 - 911 added a date function, solid balance, dual top plates
    • 1996 Calibre 914 - manual with gong
  • Automatic winding
  • Specialty calibres