The Jaeger-LeCoultre Master Compressor Diving Chronograph. Model reference: Q186T770
This is a Titanium Jaeger-LeCoultre Master Compressor Diving Chronograph, Q186T770. It has a vulcanized rubber coated titanium bracelet with a matching Titanium double deployant clasp, rubber-clad screw-down winding crown, and chronograph buttons with twistlock guards. The solid 44mm diameter three-body case is polished and brushed, with a scratch-resistant anti-reflective sapphire crystal, and a graduated unidirectional bezel. It has a screwed-down case back secured by 4 screws with the World globe logo engraved on it, and a 65-hour power reserve at full wind. The dial is black with luminous alpha hands and dart index hour markers, with Arabic half hour numerals. The chronograph subsidiary dials consist of the 12-hours at 9 o’clock, and the 30-minute dial at 3. A date window aperture is at 5 o’clock, and there is an outer 1/5 second/minute track, as well as an outermost pulsometer. It is water resistant to 1000 meters (3300 feet), and the 13.4mm thick case, dial, and movement are all signed.
The automatic self-winding Jaeger LeCoultre caliber 751D movement is rhodium-plated, with fausses cotes embellishment. It’s constructed with 41 jewels, 272 components, a shock absorber mechanism, and a straight-line lever escapement. It has a monometallic balance that’s adjusted to 5 positions, and a self-compensating flat balance spring. The mechanism oscillates at 28,800 vph (4 Hz).
Jaeger LeCoultre The first Master Compressor was introduced in 2002; it was a new design based on their Memovox Polaris of 1965. This advanced version debuted in 2007.
The watch comes in original packaging, with a set of documents.