Jaeger-LeCoultre Master

The Jaeger-LeCoultre 866 calibre is a remarkable automatic movement, intricately composed of 344 individual components housed within a single barrel. This finely engineered mechanism is powered by 34 jewels and operates at a frequency of 28,800 vibrations per hour. With an impressive power reserve of 70 hours, the calibre achieves a strikingly slender profile of just 6.15mm. Its aesthetic appeal is enhanced by elegant Cote de Genève and perlage decorations, complemented by distinctive bluish screws. This calibre supports a range of functions, including hours, minutes, and small seconds, as well as day, month, and moon phase complications, making it an ideal and dependable partner for select Master Control watches.