JLC 829

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Calibre 829 is a chronograph movement from Jaeger-LeCoultre introduced in 1998.

Cal. 829 is a tonneau-shaped hand-winding chronograph movement with a retrograde minute counter and column wheel design. It operates at 28,800 A/h and measures 26.8 x 23.3 mm in size and 4.5 mm thick. It has 38 jewels and a 40 hour power reserve.

Cal. 829 was used in the limited-production Reverso Chronograph Rétrograde. Although announced with Cal. 829, a simplified version (Cal. 859) would see full production in the Reverso Gran'Sport Chronograph of 2001.